Msg Nr. : 33059 Da : ON9CSK Per : KENWOO@WW Tipo/status : B$ Data/ora : 0817/0942 Dimensione :14375 Titolo : TH-78E 1/1 mods Bid (Mid) : 148309ON7RC de ON9CSK @ ON7RC.BT.BEL.EU to KENWOOD @ WW TH-78A (U.S.A. version) --> TH78E (European version) MODS. ********************************************************** Hello TH78 user, If you bought a TH78A in the USA you don't have the 1750 Hz repeater tone access, but you can change that ! Apart from the well-known six diodes, the new CPU has 2 green wires. In order to use the TH78A in EU, you must do the following: - First you have to remove D2 for the standard EU bands (144-146 and 430-440 MHz). - Now control that the 2 green wires and the 5 other diodes are installed (D1, D3, D4, D5 and D6). - If you need band expantion and components location, please see the mods below. Although the TH78A has a special bandpass filter for the US 70cm band, I could not notice a decrease in sensitivity in the EU part of the 70 cm band. There is a function change for 3 knobs; please see below and also p. 6 and 7 of your INSTRUCTION MANUAL. TH-78A --> TH-78E --------------------------- LAMP --> TONE 1750 Hz CALL --> LAMP TONE --> CALL Now, you can choice between the CTCSS tones and the 1750 Hz with the following sequence: F + LAMP (the new TONE !) and then the right rotary encoder to make your frequency choice. ******************************************************************************* KENWOOD TH-78E MODS ******************* Hello TH-78E user, I recently bought a TH-78E which apparently had a new CPU. You can see this internally. Apart from the well-known six diodes it also has two green wires, indicated on the PCB as W1 and W2. WARNING !!! ----------- In the course of performing mods on my Kenwood TH-78E dual band handheld, I've discovered a potential flaw in the case design. While handling my walkie one day (after the mods were done), the display went blank and I could not turn the radio back on. With the radio split in half again, I could turn the radio back on but discovered all the memories were erased. The cause turned out to be some component pins on the front face coming in contact with the square bodies of the two volume/channel/squelch switches, when the case is screwed back together snuggly. I placed small strips of electrical tape on the sides of the switches to insulate, and reassembled; problem solved. Now, I had to reprogram the darn thing.... =============================================================================== The Guide to Undocumented Features of the TH-78E ------------------------------------------------ The information contained in this document is derived from many sources. Thanks to all. This document is probably not complete; if you have more info's, please send it to me. 1. Hardware Mods ---------------- Hardware modifications for the TH-78E are performed by manipulating 2 green wires and a series of 6 surface mounted diodes, identified as D1 through D6. The TH-78E block diagram contains a table identifying configurations involving D2, D3, D5, and D6. However, none of the configurations described below are included in that table. To open the radio, follow the instructions on p. 64 of the INSTRUCTION MANUAL. The two TX/RX busy indicators (LEDs) have rubber seals placed over them. These have a tendency to fall off when opening or closing the radio. The diodes and wires are located on the CPU board, which is mounted inside the front panel of the radio. The CPU board is readily identified by a brass shield covering the CPU, as well as the socket for the ME-1 memory expansion chip. All position references in this document assume that you are looking at the CPU board with the rotary encoders and TX/RX busy indicators at the top. If you have installed the ME-1 EEPROM, I recommend that you temporarily remove it to facilitate access to the diodes. The diodes are located in a vertical row just below the lower right corner of the brass shield. The diodes are numbered sequentially, starting with D1 at the top. The E3 configuration (144-146 and 430-440 MHz) has diodes D1, D3, D4, D5 and D6 and the 2 green wires in place. Remove jumper W1 (one of the two green wires). RX is: 50-136 AM, 136-180 FM, 300-400 AM/FM, 400-512 FM (VHF SIDE). 50-180 FM, 400-512 FM, 800-1000 FM (UHF SIDE). TX is: 136-180 FM and 400-512 FM. Now, you can reprogram the vfo's limits like explained on p.15 of the INSTRUCTION MANUAL. Crossband repeat mod: Remove D4. 2. Software Mod --------------- If you don't need the TX MOD, try the following: Push PTT + VFO and POWER ON. TX is not affected, RX is like above. 3. Undocumented Features ------------------------ Crossband Repeater: Press F for 1 second, then 0 (requires D4 mod). Repeat the same sequence to disable. Cloning: Press 0 during power-up. Allows cloning over the air. All keys except PTT and POWER are disabled. Press PTT to send DTMF cloning sequence. Presumably, receiving TH-78E must be in same mode. Toggle SHIFT/SPLIT Mode: Press SHIFT during power-up. This is described in the manual, but the documentation is not complete. The TH-78E can operate in two modes: In SPLIT mode, non-standard offsets (i.e. split frequencies) are supported, but the default offset is not programmable. In SHIFT mode, non-standard offsets are not allowed, but the default offset is programmable. To select the default offset, press F for 1 second, then SHIFT. See p. 30 of the manual for details on changing the default offset. Toggle CALL Button Function: Press CALL during power-up. The CALL button can operate in one of two modes. In the default mode (CALLSW), it switches between the call channel and the last memory channel (if in memory recall mode) or last frequency (if in VFO mode). After toggling the CALL button functionality (VMC), it will switch from the VFO to the last memory channel and then back to the CALL channel. AM/FM switching: Hold down VFO key and switch the POWER ON to switch between AM and FM reception. This work only in the 300 MHz band ! VHF & UHF expansion: Press the F key for 1 second, then press the BAND key. On VHF you have now 300-400 AM/FM RX and on UHF 800-1000 FM RX. Channel display mode: Hold down 3 key and switch the POWER ON. Channels are displayed by number instead of frequency. (NOTE: this function only works when Alpha-Numeric memory is enabled). 4. Considerations ----------------- The display range of the TH-78 is very wide, but usefull range is more little and is different from one set to the other. For some frequencies, the TH-78 will "beep": this is PLL unlock and there is no RX/TX ! For high frequencies the red TX led will not glow: no TX ! The locking ranges are different on MAIN BAND and SUB BAND. When monitoring 2 VHF freq., the sensitivity of the MAIN VHF BAND is attenuated but VHF SUB BAND is still good. Thus monitor strong VHF signals on VHF MAIN BAND and weak VHF signals on VHF SUB BAND. VHF SUB BAND work only in FM and not in AM. When monitoring (VHF or UHF) out of ham band signals, sensitivity is realy better in SUB BAND. Also the rubber duck antenna has only a good efficiency in the ham frequencies, that's why my preference go to the 37 cm long COMET CH-600MX antenna. Sensitivity in the 959 MHz portable telephone band is low, but good enough to listen the neighbours cordless telephones. Sensitivity in the 300 MHz band is very low. When charging PB13 battery, you need 15.5 V on the DC IN TERMINAL to have a charge current of 70 mA (1/10 of C) for 15 H. ******************************************************************************* *** GAME *** (Available without any modifications) -------------------------------------------------- Hold down the M and PTT keys and switch the power ON. (Be very careful the PTT is depressed or else a memory reset will occur.) 1) Play the memory game. The radio will beep and display one of the following characters: "1, 2, 3, F" (top row of buttons). Radio starts with one character and adds a new one on after every round until 20 characters are reached. You must press the keys in the same sequence they are displayed. When you can follow the radio for 20 characters, then you will win 100 coins and enter the poker game. (Note: I am terrible at this game, so I cheated by writing down the character sequence on paper.) 2) Poker game. (Much more interesting than the first game, IMHO) Place the bet (1 to 10). Increase the bet with the up key 2, decrease the bet with the down key 5. Press F to deal the cards. Cards are (2,3,4,5,6,7,8,9,+,J,K,Q,A NOTE: 10 = "+") Press PTT to see the suits. Press numbers 1 through 5 to change the respective cards. Press F to deal the new cards. If you win any amount, you can bet for double or nothing. Press F to play "BIG or SMALL". Press LOW to keep your winnings. BIG or SMALL ------------ Arandom card will be chosen. Push 2 (big) if you think this card is going to be larger than 8. Push 5 (small) if you think this card is going to be less and 8. (if an 8 is drawn, then a tie occurs, and you neither win nor lose) Press F to draw the random card. You either double your winnings or lost it all. Press F to continue playing Big or Small. Press LOW to keep winnings and continue playing poker. Push the LAMP key to exit the game mode. Note: While in game mode, receive functions still operate! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Game Mode: Press M and PTT during power-up (be careful not to accidentally reset the memory (M+POWER)). To exit the game mode at any time, press the LAMP key. It is not possible to change the volume, lamp, or frequency settings while in game mode. The top part of the display will show H.00, which represents the high score. The lower part shows a scrolling message, "PRESS ANY KEY". Pushing any key starts a "Follow Simon" type game. The display will briefly show one of the characters "1", "2", "3", or "F". Press the corresponding key. The game consists of repeating the displayed character sequence, which increases by one character each round. After you "win" the Simon memory game by getting correctly entering a sequence of twenty characters, the next game is a draw poker game. The way it works is that you choose your bet (from 1 to 10) by pressing 2 to increment the bet and 5 to decrement the bet. Then, press F to deal the five cards. The face value of the cards is displayed, and the suits can be seen at any time by holding down the PTT key. Any number of cards may be discarded, and to select (or deselect) a card for discarding, press the keys 1, 2, 3, 4, or 5. If a card is selected for discard, it is displayed "face-down". Press F again to draw new cards. Your new cards will be displayed, and then if your hand is 2-pair or better, the screen will show the rank of your hand on the left (2P for 2-pair, 4K for four-of-a-kind, etc.). On the right the pay- off for that hand will be displayed. Your bet is multiplied by the pay-off factor,and the resulting pile of cash is displayed in the right hand side of the upper screen. (The left hand side of the upper screen contains your table stakes, which are initially 100 coins from winning the Simon game.) If you win the poker hand, pressing any key steps into the next stage. If you lose the poker hand, your bet is deducted from your stakes and you are asked to start another poker hand. In the next stage, you are asked "TRYB/S" which means, "Do you want to try double-or-nothing in a guessing game for Big or Small cards?" Press F for yes, press TONE for no. If you say no, your winnings are credited into your stakes and you are asked to start another poker hand. If you say yes, then a single shuffling/incrementing card is displayed on the left, and three stars are displayed on the right. You have to choose to go for either BIG or SMALL, by pressing 2 or 5. You can keep pressing 2 and 5 to change your mind. When you are ready, you must try to hit the F key to stop the rotating card display, and the card will show, and you will either win, lose, or draw. If you draw, you have to play big/small again, I think. If you lose, your winnings are gone and you can play poker again. If you win, your winnings double and you are asked whether you want to play big/small again. The payoffs on the poker are set against you, odds-wise; the double-or-nothing game includes a draw, so the odds are against the player there unless you can time hitting the F key to win more than half the rounds. I haven't managed to do this, so I don't know if there is anything beyond this, all I know is that when the table stakes are exhausted, you go back to playing Simon again. ******************************************************************************* 73's and try it at your own risk ! I haven't tried the games. Karl, ON9CSK @ ON1BWP.#BTN.BEL.EU Msg Nr. : 33058 Da : ON9CSK Per : KENWOO@WW Tipo/status : B$ Data/ora : 0817/0922 Dimensione :13467 Titolo : TH-78A 1/2 mods Bid (Mid) : 148306ON7RC de ON9CSK @ ON7RC.BT.BEL.EU to KENWOOD @ WW KENWOOD TH-78A MODS ******************* RX MOD: ------- Push PTT + VFO and POWER ON. Range is: in VHF: 50-136 AM, 136-180 FM, 300-400 AM/FM. in UHF: 400-512 FM, 800-1000 FM. =============================================================================== Hello TH78 user, I recently bought a TH78A in the USA which apparently had a new CPU. You can see this internally. Apart from the well-known six diodes it also has two green wires, indicated on the PCB as W1 and W2. In order to use the TH78A in EU there are several ways to expand the 70cm TX/RX range. First you have to caut W1 (bottom one when antenna points upwards). Then you can remove D2 for the standard EU band (I did not try this) or remove D3 for extended RX/TX coverage (this is what I did). Of course you can then set the band edges as indicated in the manual. Although the TH78A has a special bandpass filter for the US 70cm band, I could not notice a decreased sensitivity in the EU part of the 70 cm band. If you do notice a decrease in sensitivity you need to install the EU filter which includes one L and two C's (SMD). This might be difficult to do without proper tools and experience in handling SMD components. 73, Enno, PA0ERA @ PI8AIR or DK0MWX z =============================================================================== Hi TH-78 users, Recently I discovered (by accident) on my TH-78 how to clone memory from one rig to another (without cable) yes sir, OVER THE AIR !!! You can clone your friend's rig as far as your station can reach. PROCEDURE: - Select a simplex frequency (UHF ou VHF) (the same freq. on both HT) - Select LOW power (not to disturb). - Be sure your PTT is on the right side. - Be sure to have an antenna or a dummy load connected on both HT. - HOLD "0" and turn ON both HT one after the other, no need to hurry... You will see "CLONE" message If you want to abort, turn OFF the HT. - To start the process, hit the PTT of the ""master"" HT. The ""master"" HT will transmit tones over the air for about 2 minutes. (Note that you will lost control of both HT, the only working button is the POWER switch.) - As soon as you see "END" msg on the "cloned" rig, the process is ended, turn OFF both rigs and see by yourself, memories are now exactly identical for both HT. If you have 250 memories, you save about an hour of programming. Enjoy it. Steve. VE2FOP @ VE2GPQ.PQ.CAN.NA =============================================================================== Subject : KENWOOD TH-78A MOD WARNING ------------------------------------ In the course of performing mods on my Kenwood TH-78A dual band handheld, I've discovered a potential flaw in the case design. While handling my walkie one day (after the mods were done), the display went blank and I could not turn the radio back on. With the radio split in half again, I could turn the radio back on but discovered all the memories were erased. The cause turned out to be some component pins on the front face coming in contact with the square bodies of the two volume/channel/squelch switches, when the case is screwed back together snuggly. I placed small strips of electrical tape on the sides of the switches to insulate, and reassebled; problem solved. Now I have to reprogram the darn thing.... Mark WB1E @ K1RQG.ME.USA.NA =============================================================================== The Complete Guide to Undocumented Features of the TH-78A --------------------------------------------------------- The information contained in this document is derived from many sources. Unfortunately, I have not kept track of everyone who has provided input, but I would like to thank those who have helped me compile this information. This document is probably not complete: Please send any additions to n1jhw @ ka1srd.#ema.ma.usa.na I've had one report that the TH-78A is capable of in-band full duplex operation. I've been unable to repeat this on my unit, which only has the CAP/MARS mod perform. Confirmation of this feature would be appreciated. Please Note: I can take no responsibility for any problems which may be caused by attempting to access one of the features described here. This document may be distributed in its original form only, and not via packet radio. 1. Hardware Mods Hardware modifications for the TH-78A are performed by manipulating a series of 6 surface mounted diodes, identified as D1 through D6. The TH-78A block diagram contains a table identifying 7 configurations involving D2, D3, D5, and D6. However, none of the configurations described below are included in that table. To open the radio, follow the instructions on p. 64 of the manual. The two TX/RX busy indicators (LEDs) have rubber seals placed over them. These have a tendency to fall off when opening or closing the radio. The diodes are located on the CPU board, which is mounted inside the front panel of the radio. The CPU board is readily identified by a brass shield covering the CPU, as well as the socket for the ME-1 memory expansion chip. All position references in this document assume that you are looking at the CPU board with the rotary encoders and TX/RX busy indicators at the top. If you have installed the ME-1 EEPROM, I recommend that you temporarily remove it to facilitate access to the diodes. The diodes are located in a vertical row just below the lower right corner of the brass shield. The diodes are numbered sequentially, starting with D1 at the top. The U.S. stock configuration has all diodes in place. The function of D1 is not known at this time. D2, D3, D5, and D6 are thought to control TX and RX ranges. D4 controls cross-band repeat. Before removing a diode, Kenwood recommends unsoldering the brass shield. There are four solder points, one at each corner. The brass shield is attached to the CPU with a small piece of double-sided adhesive tape. An alternate method consists of unsoldering the right side of the appropriate diodes, which are visible underneath the shield, and bending them to approximately a 45 degree angle, forming an open circuit. Early Model Radios Only ======================= CAP/MARS mod: Remove D6 only. Yields RX 118-174 TX 142-152 RX 400-512 TX 425-455 Beyond MARS mod: Remove D5 only. Yields RX 50-180 TX 136-180 RX 300-400 [VHF side only] RX 400-512 TX 400-512 RX 800-950 [UHF side only] Late Model Radios Only ====================== Beyond MARS mod: Remove D3. Also remove jumper W1. Yields RX 50-180 TX 136-180 RX 300-400 [VHF side only] RX 400-512 TX 400-512 RX 800-950 [UHF side only] Note: The frequency ranges include the lower limit, but exclude the upper limit (i.e. 118-174 really means 118.000-173.995). Crossband repeat mod: Remove D4. Apparently, this mod is independent of the D5/D6 mods. 2. Undocumented Features Crossband Repeat: Press F for 1 second, then 0 [requires D4 mod] Repeat the same sequence to disable. Wideband RX: Press F for 1 second, then BAND [requires D5 mod] On the VHF side this yields 300-400 RX, on UHF 800-950 RX. Sample Channels: Press DUAL during power-up Programs some sample frequencies in VHF and UHF memory channels (it's a pain to undo the sample programming). Cloning: Press 0 during power-up [requires D5 or D6 mod] Allows cloning over the air. All keys except PTT and POWER are disabled. Press PTT to send DTMF cloning sequence. Presumably, receiving TH-78A must be in same mode. Toggle SHIFT/SPLIT Mode: Press SHIFT during power-up This is described in the manual, but the documentation is not complete. The TH-78A can operate in two modes: In SPLIT mode, non-standard offsets (i.e. split frequencies) are supported, but the default offset is not programmable. In SHIFT mode, non-standard offsets are not allowed, but the default offset is programmable. To select the default offset, press F for 1 second, then SHIFT. See p. 30 of the manual for details on changing the default offset. Toggle CALL Button Function: Press CALL during power-up. The CALL button can operate in one of two modes. In th default mode (CALLSW), it switches between the call channel and the last memory channel (if in memory recall mode) or last frequency (if in VFO mode). After toggling the CALL button functionality (VMC), it will switch from the VFO to the last memory channel and then back to the CALL channel. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Game Mode: Press M and PTT during power-up [be careful not to accidentally reset the memory (M+POWER)] [Much of this was provided by james@brokaw.lcs.mit.edu] To exit the game mode at any time, press the LAMP key. It is not possible to change the volume, lamp, or frequency settings while in game mode. The top part of the display will show H.00, which represents the high score. The lower part shows a scrolling message, "PRESS ANY KEY". Pushing any key starts a "Follow Simon" type game. The display will briefly show one of the characters "1", "2", "3", or "F". Press the corresponding key. The game consists of repeating the displayed character sequence, whic h increases by one character each round. After you "win" the Simon memory game by getting correctly entering a sequence of twenty characters, the next game is a draw poker game. The way it works is that you choose your bet (from 1 to 10) by pressing 2 to increment the bet and 5 to decrement the bet. Then, press F to deal the five cards. The face value of the cards is displayed, and the suits can be seen at any time by holding down the PTT key. Any number of cards may be discarded, and to select (or deselect) a card for discarding, press the ke ys 1, 2, 3, 4, or 5. If a card is selected for discard, it is displayed "face-down". Press F again to draw new cards. Your new cards will be displayed, and then if your hand is 2-pair or better, the screen will show the rank of your hand on the left (2P for 2-pair, 4K for four-of-a-kind, etc.). On the right the pay- off for that hand will be displayed. Your bet is multiplied by the pay-off factor,and the resulting pile of cash is displayed in the right hand side of the upper screen. (The left hand side of the upper screen contains your table stakes, which are initially 100 coins from wi nning the Simon game.) If you win the poker hand, pressing any key steps into the next stage. If you lose the poker hand, your bet is deducted from your stakes and you are asked to start another poker hand. In the next stage, you are asked "TRYB/S" which means, "Do you want to try double-or-nothing in a guessing game for Big or Small cards?" Press F for yes, press TONE for no. If you say no, your winnings are credited into your stakes and you are asked to start another poker hand. If you say yes, then a single shuffling/incr ementing card is displayed on the left, and three stars are displayed on the right. You have to choose to go for either BIG or SMALL, by pressing 2 or 5. You can keep pressing 2 and 5 to change your mind. When you are ready, you must try to hit the F key to stop the rotating card display, and the card will show, and you will either win, lose, or draw. If you draw, you have to play big/small again, I think. If you lose, your winnings are gone and you can play poker again. If you win, your winnings doub le and you are asked whether you want to play big/small again. The payoffs on the poker are set against you, odds-wise; the double-or-nothing game includes a draw, so the odds are against the player there unless you can time hitting the F key to win more than half the rounds. I haven't managed to do this, so I don't know if there is anything beyond this, all I know is that when the table stakes are exhausted, you go back to playing Simon again. =============================================================================== From njitgw.njit.edu!rutgers!cbmvax!sterling Tue Jun 30 16:08:31 EDT 1992 Article: 20651 of rec.radio.amateur.misc Path: njitgw.njit.edu!rutgers!cbmvax!sterling From: sterling@cbmvax.commodore.com (Rick Sterling - Test Eng) Newsgroups: rec.radio.amateur.misc Subject: Re: Wanted: Kenwood TH-78 mods Message-ID: <32512@cbmvax.commodore.com> Date: 25 Jun 92 16:14:07 GMT References: <27233@goofy.Apple.COM> Reply-To: sterling@cbmvax.commodore.com (Rick Sterling - Test Eng) Organization: Commodore, West Chester, PA Lines: 57 In article <27233@goofy.Apple.COM> pvh@apple.com (Pete Helme) writes: >Does anyone have mods for this new dual band radio? I heard something about >removing resitors D4 & D6, but would like clarification on that. > >Also, does this radio have the same hole around 460 that the TH-77 had? > >Thanks, > >Pete Helme >N6YLJ > >pvh@apple.com d1-d6 are next the microprocessor under the edge of the copper shield. d6 is closest to the battery pack connector. ------ d4 out = Cross Band Repeat Enabled use F ( 1 second ) 0 to toggle ------ d6 out d5 in = CAP/MARS mod ------ d6 in d5 out = Beyond Mars Use F ( 1second ) BAND to toggle extended band VHF normal tuning display 50 to 180 Mhz ( AM detect 118-136 ) VHF extend 300 to 400 Mhz UHF normal 400 to 512 Mhz ( no holes ) UHF extend 800 to 950 Mhz ------ The diodes are teenie-tiny surface mount types. Be SURE you have the correct tools and know-how before attempting these changes. Standard disclaimers apply. NOTE: The TH78A is NOT type accepted for transmit outside the amateur/cap/mars bands. PROTECT YOUR LICENSE. -- __ __ |__) (__` | \ick ,__)terling ----------------------------------------------- Test Engineering Commodore Technology Group (215)-431-9275 UUCP ...{uunet,allegra,rutgers}!cbmvax!sterling Well, you CAN make the newer version transmit out of band. I was in Michigan over the weekend and started modifying my dad's "jumpered" 78A in various ways. Taking out W1 enabled MARS/CAP frequencies and XMIT, but not extended receive. Next we took out W2, and it enabled extended receive in both the UHF and VHF bands, but still no transmit. We soldered back W1 and it still had extended receive in both bands. Next came out D5 and still no out-of-band transmit. Then came D4. No change! We replaced both diodes and went for D3. That was it! You now had out-of-band transmit throughout almost all of the VHF and UHF bands. I'm pretty sure either D4 or D5 controls the cross-band repeat, but we didn't worry about, since we couldn't remember how to turn it on at the time. (Believe it or not, we were modifying my dad's radio on his boat, without any documentation, just a soldering iron! :-) Interestingly enough, my dad's radio goes up to 999.975 MHz, whereas mine will only go to 949.975 MHz. Not sure what the sensitivity is like up there, but it is a difference. Thought you might be interested. ----------------------------- I have veryfied this , and D3 will indeed enable out of band transmit. Other features enabled as side efects : Clone mode - on+0 then ptt to upload DTMF stream Poker game - on+m+ptt then you get first someting like the mind game , then a series of other games. Sample : ??? what does it do ? on+dual will wipe out some of your memories and put weird values into them Hidden toggle : f longer than 1 sec. then m toggles someting , but what ? to find : the autoanswerback paging feature. Please e-mail any additions, corrections to luca@napoleon.eetech.mcgill.ca ========================================================================== Newsgroups: rec.radio.amateur.misc From: rfc@allegra.att.com (Robert F. Casey) Subject: TH78A mod file, crossband repeat, extended RX/TX, cloning Message-ID: <1992Oct25.051148.8822@allegra.att.com> Organization: AT&T Bell Laboratories, Murray Hill, NJ Date: Sun, 25 Oct 1992 05:11:48 GMT Lines: 156 copied from packet: Msg# TSF Size #Rd Date Time Arrived Seq # Msg ID Route 2182 BF 7214 2 22-Oct 1938z 22-Oct (019609 - 029771WT3V ) [] N2CZF ==> MODS@ALLUSA "TH-78A Modification File" Date: 22 Oct 92 15:38:10 EDT (Thu) From: n2czf@wt3v.nj.usa (Rich Garcia) Message-ID: <029771WT3V> Reply-To: n2czf@wt3v.nj.usa To: mods@allusa Subject: TH-78A Modification File FILENAME:TH-78A.MOD June 25,1992 Revised: October 22, 1992 Modifications for the Kenwood TH-78A Dual Band Micro-HT. By Rich Garcia N2CZF. Packet Via N2CZF@WT3V.NJ.USA Owner assumes all responsibility for modifying or using these modifications!. The following mods will provide for Crossband Repeat and extended receive and transmit on the Kenwood TH-78A HT. I believe other functions are also enabled by these mods. which I have not found yet but I will update the file as news progresses. Diode #4- Crossband Repeat Diode #5- Extended Receive and out of band Transmit. Remove all screws and open radio as explained in the Kenwood manual for installing the memory expansion module. On the back cover you will find the memory expansion module socket and a copper shield to the upper left corner of it. Under this shield their will be a row of SMC diodes which are unmarked in a vertical configuration to the lower right portion covered by the shield. #1 Remove the shield at its four corners with a solder sucker and SMALL! iron. #2 Carefully count down from the 1st diode in the row to the fourth one and remove for crossband repeat. HINT: I found if you BRIEFLY touch the iron to the right side lead while gently pulling up on the SMC diode it should completely come off without needing to apply heat to the other side and further risk board damage. I used a pair of right angle surgical tweezers for this. #3 Just as above you may remove the fifth diode to preform the extended receive and transmit modification. #4 Reset the CPU (yes you will loose all of your programed memories! argh!) by pressing Function for more than one second and then "0". YOU HAVE NOW COMPLETED THE MODIFICATIONS! #5 For 800Mhz go to the UHF band with the band switch and press Function for more than one second quickly following with a press of the Band switch again. 8---.-- will appear. #6 For 300MHz go to the VHF band and repeat as above. Original bands are restored by repeating the "F Band" sequence. MY observations... All original functions have maintained the same which is great. Aircraft band which was accessible before the mod remains with the same characteristics. It seems that VHF-High band has improved a bit on sensivity where it was dead as a dog before the mod (above 155.000MHz) but the 162.000 MHz band where weather radio is is still a bit deaf for reception at any distance but about 20 Miles. This depends on your (or my) terrain and transmitter output power. On UHF all public safety frequencies up to about 500 MHz seem to come in well but sensivity greatly drops from there (we really can't ask for more). Frequencies can be programed in up to the 920MHz ham band but I have no way of measuring sensivity. 800MHz works but the signals are very weak, you must be near the transmitter for reception. Assuming you are in the town or city where the transmissions originate it should work. Transmit is enabled up to and incl. 500MHz but after testing this on a frequency counter I find that a signal is only generated to about 490 MHz, even though the trans. LED shows output in the higher frequencies. Crossband repeat seems to work fine but the audio is unacceptable for use, BE AWARE the radio gets HOT! Prolonged use or use on a busy frequency would not be recommended. Also remember this is a dual band HT please use a proper antenna while in this mode to avoid a high SWR, we should all know better... Right? After first booting up the CPU in the mod I found that the message screen showed "Cloning" so it seems that this radio now has cloning capabilities. After searching I have found that holding the "0" key and powering up the radio will display the clone feature, see below for further explination.This leads me to believe that this HT may have some more "Hidden" features that I am trying to find, some may be useful. Thanks to Gary KC8UD who sent me the following via packet ..... CLONING: The TH-78 can be cloned without cloning cables or special equipment. It is done entirely with RF, and, in fact, can be transmitted over the air, and even via repeaters. This may be extremely useful for those users who do not have the patience to program their own radios themselves. This application would also be useful for clubs and user groups. (However, this can take as long as 50 minutes with the ME-1 expansion module. It is recommended that a dummy load be used to prevent unwanted QRM.) (1) Both radios must be on the same frequency. (2) Activate both radios by pressing the "0" key while turning the power on. The radios will display CLONE. (3) Now, click the PTT of the "master" radio. The radio will transmit in the conomy low power mode. This may take about 4 minutes for fifty channels. hen the data has been transferred, both radios will revert back to the riginal frequency. (4) Turn both radios off and then on again. They will now operate normaly while the slave radio has the same memory contents as the master radio. ** I have not tried the following modification myself, try at your own risk ** *** Rich N2CZF *** FREQUENCY EXPANSION (1) You can receive from 340 - 399.987 Mhz FM by removing chip diode D8 on the ontrol unit. To access this function, press the [F] key for one second, and then the [LOW] key. This toggles between AMATEUR, AIR band (AM) and 360 Mhz. AM and FM modes are selected automatically, depending on frequency. ** Since "F" for a second and "Low" toggles the power output, I wonder ** *** Rich N2CZF *** There is also a couple of arcade type games on the TH-78A. To start the game you pres and hold [PTT] and [M] keys while turning the unit on. The first game is a follow me type game. The radio beeps and shows a sequence of numbers flashing on the screen. You have to match the same sequence on the tone pad. Each time the sequence gets longer by one number. You have to keep remembering the sequence as one gets added each time. Once you get to a certain high score on that game, it breaks into a poker type game. To exit the game mode press the LAMP key at any time. The receiver still works in the game mode and you can adjust volume but no other features. RG> The games seem to work fine and it is interesting that they have inserted that into the programing of the chips. Does anyone know of any further features in the radio be it games or radio functions. 73's Rich N2CZF Bricktown, NJ ============================================================================= Note: I haven't tried or verified this, proceed at your own risk. And do not transmit outside of legal bands! WA2ISE ============================================================================== The Complete Guide to Undocumented Features of the TH-78A The information contained in this document is derived from many sources. Unfortunately, I have not kept track of everyone who has provided input, but I would like to thank those who have helped me compile this information. This document is probably not complete: Please send any additions or corrections to aviator@athena.mit.edu (Internet) or n1jhw@ka1srd.#ema.ma.usa.na (amateur radio packet) or ma0226@ma1bbs.mawg.ner (Civil Air Patrol packet). I've had one report that the TH-78A is capable of in-band full duplex operation. I've been unable to repeat this on my unit, which only has the CAP/MARS mod perform. Confirmation of this feature would be appreciated. Please Note: I can take no responsibility for any problems which may be caused by attempting to access one of the features described here. This document may be distributed in its original form only, and not via packet radio. 1. Hardware Mods Hardware modifications for the TH-78A are performed by manipulating a series of 6 surface mounted diodes, identified as D1 through D6. The TH-78A block diagram contains a table identifying 7 configurations involving D2, D3, D5, and D6. However, none of the configurations described below are included in that table. To open the radio, follow the instructions on p. 64 of the manual. The two TX/RX busy indicators (LEDs) have rubber seals placed over them. These have a tendency to fall off when opening or closing the radio. The diodes are located on the CPU board, which is mounted inside the front panel of the radio. The CPU board is readily identified by a brass shield covering the CPU, as well as the socket for the ME-1 memory expansion chip. All position references in this document assume that you are looking at the CPU board with the rotary encoders and TX/RX busy indicators at the top. If you have installed the ME-1 EEPROM, I recommend that you temporarily remove it to facilitate access to the diodes. The diodes are located in a vertical row just below the lower right corner of the brass shield. The diodes are numbered sequentially, starting with D1 at the top. The U.S. stock configuration has all diodes in place. The function of D1 is not known at this time. D2, D3, D5, and D6 are thought to control TX and RX ranges. D4 controls cross-band repeat. Before removing a diode, Kenwood recommends unsoldering the brass shield. There are four solder points, one at each corner. The brass shield is attached to the CPU with a small piece of double-sided adhesive tape. An alternate method consists of unsoldering the right side of the appropriate diodes, which are visible underneath the shield, and bending them to approximately a 45 degree angle, forming an open circuit. Early Model Radios Only ======================= CAP/MARS mod: Remove D6 only. Yields RX 118-174 TX 142-152 RX 400-512 TX 425-455 Beyond MARS mod: Remove D5 only. Yields RX 50-180 TX 136-180 RX 300-400 [VHF side only] RX 400-512 TX 400-512 RX 800-950 [UHF side only] Late Model Radios Only ====================== Beyond MARS mod: Remove D3. Also remove jumper W1. Yields RX 50-180 TX 136-180 RX 300-400 [VHF side only] RX 400-512 TX 400-512 RX 800-950 [UHF side only] Note: The frequency ranges include the lower limit, but exclude the upper limit (i.e. 118-174 really means 118.000-173.995). Crossband repeat mod: Remove D4. Apparently, this mod is independent of the D5/D6 mods. 2. Undocumented Features Crossband Repeat: Press F for 1 second, then 0 [requires D4 mod] Repeat the same sequence to disable. Wideband RX: Press F for 1 second, then BAND [requires D5 mod] On the VHF side this yields 300-400 RX, on UHF 800-950 RX. Sample Channels: Press DUAL during power-up Programs some sample frequencies in VHF and UHF memory channels (it's a pain to undo the sample programming). Cloning: Press 0 during power-up [requires D5 or D6 mod] Allows cloning over the air. All keys except PTT and POWER are disabled. Press PTT to send DTMF cloning sequence. Presumably, receiving TH-78A must be in same mode. Toggle SHIFT/SPLIT Mode: Press SHIFT during power-up This is described in the manual, but the documentation is not complete. The TH-78A can operate in two modes: In SPLIT mode, non-standard offsets (i.e. split frequencies) are supported, but the default offset is not programmable. In SHIFT mode, non-standard offsets are not allowed, but the default offset is programmable. To select the default offset, press F for 1 second, then SHIFT. See p. 30 of the manual for details on changing the default offset. Toggle CALL Button Function: Press CALL during power-up. The CALL button can operate in one of two modes. In th default mode (CALLSW), it switches between the call channel and the last memory channel (if in memory recall mode) or last frequency (if in VFO mode). After toggling the CALL button functionality (VMC), it will switch from the VFO to the last memory channel and then back to the CALL channel. ====================================================================== Game Mode: Press M and PTT during power-up [be careful not to accidentally reset the memory (M+POWER)] [Much of this was provided by james@brokaw.lcs.mit.edu] To exit the game mode at any time, press the LAMP key. It is not possible to change the volume, lamp, or frequency settings while in game mode. The top part of the display will show H.00, which represents the high score. The lower part shows a scrolling message, "PRESS ANY KEY". Pushing any key starts a "Follow Simon" type game. The display will briefly show one of the characters "1", "2", "3", or "F". Press the corresponding key. The game consists of repeating the displayed character sequence, whic h increases by one character each round. After you "win" the Simon memory game by getting correctly entering a sequence of twenty characters, the next game is a draw poker game. The way it works is that you choose your bet (from 1 to 10) by pressing 2 to increment the bet and 5 to decrement the bet. Then, press F to deal the five cards. The face value of the cards is displayed, and the suits can be seen at any time by holding down the PTT key. Any number of cards may be discarded, and to select (or deselect) a card for discarding, press the ke ys 1, 2, 3, 4, or 5. If a card is selected for discard, it is displayed "face-down". Press F again to draw new cards. Your new cards will be displayed, and then if your hand is 2-pair or better, the screen will show the rank of your hand on the left (2P for 2-pair, 4K for four-of-a-kind, etc.). On the right the pay- off for that hand will be displayed. Your bet is multiplied by the pay-off factor,and the resulting pile of cash is displayed in the right hand side of the upper screen. (The left hand side of the upper screen contains your table stakes, which are initially 100 coins from wi nning the Simon game.) If you win the poker hand, pressing any key steps into the next stage. If you lose the poker hand, your bet is deducted from your stakes and you are asked to start another poker hand. In the next stage, you are asked "TRYB/S" which means, "Do you want to try double-or-nothing in a guessing game for Big or Small cards?" Press F for yes, press TONE for no. If you say no, your winnings are credited into your stakes and you are asked to start another poker hand. If you say yes, then a single shuffling/incr ementing card is displayed on the left, and three stars are displayed on the right. You have to choose to go for either BIG or SMALL, by pressing 2 or 5. You can keep pressing 2 and 5 to change your mind. When you are ready, you must try to hit the F key to stop the rotating card display, and the card will show, and you will either win, lose, or draw. If you draw, you have to play big/small again, I think. If you lose, your winnings are gone and you can play poker again. If you win, your winnings doub le and you are asked whether you want to play big/small again. The payoffs on the poker are set against you, odds-wise; the double-or-nothing game includes a draw, so the odds are against the player there unless you can time hitting the F key to win more than half the rounds. I haven't managed to do this, so I don't know if there is anything beyond this, all I know is that when the table stakes are exhausted, you go back to playing Simon again. =========================================================================== From: George_Lin@mindlink.bc.ca (George Lin) Newsgroups: rec.radio.amateur.misc Subject: Re: Kenwood TH-78 mods / Game Message-ID: <13077@mindlink.bc.ca> Date: 30 Jun 92 09:38:25 GMT Organization: MIND LINK! - British Columbia, Canada Distribution: world Lines: 125 To "open up" as many feature as possible on the TH78A, remove diodes D4 & D5 (located under the copper shield). This allows the following transmit and receive frequencies RECEIVE TRANSMIT --------------- --------------- VHF BAND -------- 50-135.995 (AM) (NA) 136-179.995 136-179.995 300-399 (AM & FM) (NA) SUB-UHF 400-511.99 400-511.99 UHF BAND -------- 400-511.99 400-511.99 900-949.9875 (NA) SUB-VHF 50-179.995 (FM) 136-179.995 PERSONAL NOTES: I found that marine weather reports at 162.40MHz in my area were received much better on the VHF-SUB band, than on the VHF band. Possible hole? If you are having problems with intermod, try switching BANDS (ie. USING the SUB-VHF rather than the VHF etc.) Cellular Phones are in the 870-890 range, but the frequency increments are every 30kHz. The TH78A will only increment in 25kHz steps at this frequency range, so the exact Cellular channel frequency cannot be tuned in (most of the time). Removing D4 enables the CROSS-BAND REPEATER function. CROSS-BAND REPEATER ------------------- Press [F] key for 1 second, then the [0] (zero) key to turn this function on and off (MHz dot will flash when in repeater mode). ANSWERBACK FUNCTION (during paging reception) --------------------------------------------- Hold down [MHz] key and switch power ON to turn this function ON or OFF. 300 MHz AM/FM SWITCHING ----------------------- Hold down [VFO] key and switch the power ON to switch between AM and FM reception. VHF & UHF EXPANSION ------------------- Press and hold the [F] key for 1 second, then press the [BAND] key in the respective bands. CHANNEL DISPLAY MODE -------------------- Hold down [3] key and switch the power ON. Channels are displayed by number instead of frequency. (NOTE: this function only works when Alpha-Numeric memory is enabled) CLONE FUNCTION -------------- Hold down the [0] and switch the power ON. *** GAME *** (Available without any modifications) -------------------------------------------------- Hold down the [M] and [PTT] keys and switch the power ON. (Be very careful the PTT is depressed or else a memory reset will occur.) 1) Play the memory game. The radio will beep and display one of the followin Msg Nr. : 106618 Da : IW2BSF Per : KENWOO@ITA Tipo/status : BF Data/ora : 0130/2000 Dimensione : 2136 Titolo : TH-78 >> FM-Wide Band << Bid (Mid) : 45392_IK2HDG Salve Kenwoodiani, vi ripropongo un msg un po strano: Titolo: "NEWS TH 78 RX < 100 MHZ !!!" Ciao , ho scoperto , almeno dalle prove che ho fatto che ho potuto ritenere soddisfacenti, che il TH-78 riceve discretamente tutta la banda usale radiofonica FM fai 88 ai 108 MHz. La modifica da fare, sempre via software, e' molto semplice : come ben sapete, il vostro rtx puo' ricevere su 2 bande, voi tenete attiva solo quella piu' vicina al PTT in modo VFO. Poi spegnete l' apparato, tenete premuti i pulsanti F e M e accendette il tutto. Vedrete comparire sul display " FVOLLA " e comparira' automaticamenente anche la seconda banda. Visualizzarette 144.000 e 430.000 . Le memorie saranno RESETTATE, siete in mo o VFO e dovete agiere di conseguenza per la ricerca della "stazioni" . Per la memorizzazione della frequenza inferiori delle usuali non c' e' alcun tipo di problema nelle memorie disponibili.Diemnticavo : questa "semplice" operazione in effetti no e' cosi' semplice, perche' per far entrare l' RTX in questa mod lita'bisogna provare un po' di volte; facendo alcune ho visto che bosogna pro are circa un 8-9 volte, e poi l' RTX .... fa il suo lavoro. Un' ultima cosa : con la sua antenna originale,l' ascolto e' discreto; meglio se pero' si utilizza un anetnna apposita su questa frequenza o si ricopre di stagnola (quella da cucina) l' antenna originale. 73 by Alessio ---------- Fine Msg 102657 de IW3RFR @ IW3QER SE QUALCUNO HA VERIFICATO CHE LA SUDDETTA INFO FUNZIONA ???? 73 de Rudy IW2BSF @ IK2HDG (MIBBS ARI) Msg Nr. : 157558 Da : IW3GRW Per : TMP Tipo/status : PN Data/ora : 0225/0013 Dimensione :99991 Bid (Mid) : 2016-IW3GRW Titolo : Aclune modifiche per il TH78 **** **** ********************************************************************* **** Subject: Guide to TH-78A Undocumented Features The Complete Guide to Undocumented Features of the TH-78A The information contained in this document is derived from many sources. Unfortunately, I have not kept track of everyone who has provided input, but I would like to thank those who have helped me compile this information. This document is probably not complete: Please send any additions or corrections to aviator@athena.mit.edu (Internet) or n1jhw@ka1srd.#ema.ma.usa.na (amateur radio packet) or ma0226@ma1bbs.mawg.ner (Civil Air Patrol packet). I've had one report that the TH-78A is capable of in-band full duplex operation. I've been unable to repeat this on my unit, which only has the CAP/MARS mod perform. Confirmation of this feature would be appreciated. Please Note: I can take no responsibility for any problems which may be caused by attempting to access one of the features described here. This document may be distributed in its original form only, and not via packet radio. 1. Hardware Mods Hardware modifications for the TH-78A are performed by manipulating a series of 6 surface mounted diodes, identified as D1 through D6. The TH-78A block diagram contains a table identifying 7 configurations involving D2, D3, D5, and D6. However, none of the configurations described below are included in that table. To open the radio, follow the instructions on p. 64 of the manual. The two TX/RX busy indicators (LEDs) have rubber seals placed over them. These have a tendency to fall off when opening or closing the radio. The diodes are located on the CPU board, which is mounted inside the front panel of the radio. The CPU board is readily identified by a brass shield covering the CPU, as well as the socket for the ME-1 memory expansion chip. All position references in this document assume that you are looking at the CPU board with the rotary encoders and TX/RX busy indicators at the top. If you have installed the ME-1 EEPROM, I recommend that you temporarily remove it to facilitate access to the diodes. The diodes are located in a vertical row just below the lower right corner of the brass shield. The diodes are numbered sequentially, starting with D1 at the top. The U.S. stock configuration has all diodes in place. The function of D1 is not known at this time. D2, D3, D5, and D6 are thought to control TX and RX ranges. D4 controls cross-band repeat. Before removing a diode, Kenwood recommends unsoldering the brass shield. There are four solder points, one at each corner. The brass shield is attached to the CPU with a small piece of double-sided adhesive tape. An alternate method consists of unsoldering the right side of the appropriate diodes, which are visible underneath the shield, and bending them to approximately a 45 degree angle, forming an open circuit. Early Model Radios Only ======================= CAP/MARS mod: Remove D6 only. Yields RX 118-174 TX 142-152 RX 400-512 TX 425-455 Beyond MARS mod: Remove D5 only. Yields RX 50-180 TX 136-180 RX 300-400 [VHF side only] RX 400-512 TX 400-512 RX 800-950 [UHF side only] Late Model Radios Only ====================== Beyond MARS mod: Remove D3. Also remove jumper W1. Yields RX 50-180 TX 136-180 RX 300-400 [VHF side only] RX 400-512 TX 400-512 RX 800-950 [UHF side only] Note: The frequency ranges include the lower limit, but exclude the upper limit (i.e. 118-174 really means 118.000-173.995). Crossband repeat mod: Remove D4. Apparently, this mod is independent of the D5/D6 mods. 2. Undocumented Features Crossband Repeat: Press F for 1 second, then 0 [requires D4 mod] Repeat the same sequence to disable. Wideband RX: Press F for 1 second, then BAND [requires D5 mod] On the VHF side this yields 300-400 RX, on UHF 800-950 RX. Sample Channels: Press DUAL during power-up Programs some sample frequencies in VHF and UHF memory channels (it's a pain to undo the sample programming). Cloning: Press 0 during power-up [requires D5 or D6 mod] Allows cloning over the air. All keys except PTT and POWER are disabled. Press PTT to send DTMF cloning sequence. Presumably, receiving TH-78A must be in same mode. Toggle SHIFT/SPLIT Mode: Press SHIFT during power-up This is described in the manual, but the documentation is not complete. The TH-78A can operate in two modes: In SPLIT mode, non-standard offsets (i.e. split frequencies) are supported, but the default offset is not programmable. In SHIFT mode, non-standard offsets are not allowed, but the default offset is programmable. To select the default offset, press F for 1 second, then SHIFT. See p. 30 of the manual for details on changing the default offset. Toggle CALL Button Function: Press CALL during power-up. The CALL button can operate in one of two modes. In th default mode (CALLSW), it switches between the call channel and the last memory channel (if in memory recall mode) or last frequency (if in VFO mode). After toggling the CALL button functionality (VMC), it will switch from the VFO to the last memory channel and then back to the CALL channel. ====================================================================== Game Mode: Press M and PTT during power-up [be careful not to accidentally reset the memory (M+POWER)] [Much of this was provided by james@brokaw.lcs.mit.edu] To exit the game mode at any time, press the LAMP key. It is not possible to change the volume, lamp, or frequency settings while in game mode. The top part of the display will show H.00, which represents the high score. The lower part shows a scrolling message, "PRESS ANY KEY". Pushing any key starts a "Follow Simon" type game. The display will briefly show one of the characters "1", "2", "3", or "F". Press the corresponding key. The game consists of repeating the displayed character sequence, whic h increases by one character each round. After you "win" the Simon memory game by getting correctly entering a sequence of twenty characters, the next game is a draw poker game. The way it works is that you choose your bet (from 1 to 10) by pressing 2 to increment the bet and 5 to decrement the bet. Then, press F to deal the five cards. The face value of the cards is displayed, and the suits can be seen at any time by holding down the PTT key. Any number of cards may be discarded, and to select (or deselect) a card for discarding, press the ke ys 1, 2, 3, 4, or 5. If a card is selected for discard, it is displayed "face-down". Press F again to draw new cards. Your new cards will be displayed, and then if your hand is 2-pair or better, the screen will show the rank of your hand on the left (2P for 2-pair, 4K for four-of-a-kind, etc.). On the right the pay- off for that hand will be displayed. Your bet is multiplied by the pay-off factor,and the resulting pile of cash is displayed in the right hand side of the upper screen. (The left hand side of the upper screen contains your table stakes, which are initially 100 coins from wi nning the Simon game.) If you win the poker hand, pressing any key steps into the next stage. If you lose the poker hand, your bet is deducted from your stakes and you are asked to start another poker hand. In the next stage, you are asked "TRYB/S" which means, "Do you want to try double-or-nothing in a guessing game for Big or Small cards?" Press F for yes, press TONE for no. If you say no, your winnings are credited into your stakes and you are asked to start another poker hand. If you say yes, then a single shuffling/incr ementing card is displayed on the left, and three stars are displayed on the right. You have to choose to go for either BIG or SMALL, by pressing 2 or 5. You can keep pressing 2 and 5 to change your mind. When you are ready, you must try to hit the F key to stop the rotating card display, and the card will show, and you will either win, lose, or draw. If you draw, you have to play big/small again, I think. If you lose, your winnings are gone and you can play poker again. If you win, your winnings doub le and you are asked whether you want to play big/small again. The payoffs on the poker are set against you, odds-wise; the double-or-nothing game includes a draw, so the odds are against the player there unless you can time hitting the F key to win more than half the rounds. I haven't managed to do this, so I don't know if there is anything beyond this, all I know is that when the table stakes are exhausted, you go back to playing Simon again. Copied from the QRZ! Windows Ham Radio CDROM **** **** ********************************************************************* ***************************************************************************** Date: 07 Nov 92 14:25 Message-ID: <0@ON4UBO> From: PE1ACG@ON4UBO To: TH78@EU Subject: th78 secret function manual Path: PI8EAE!PA0SCH!IK7GFP!IK2DFZ!IW2DNI!IW2GKO!I5SGG!4X1RU ... de PE1ACG @ ON4UBO SECRET FUNCTION MANUAL OF THE KENWOOD TH-78x PORTO TH-78E RX EXPANSION (ON) Press PTT + VFO, then POWER ON. New RX ranges after this modification: VHF Band 50 - 136 Mhz (only AM) 136 - 174 Mhz (only FM) 320 - 390 Mhz (AM + FM) see note below. UHF Band 405 - 510 Mhz (only FM) 800 - 950 Mhz (only FM) VHF Band: _________ _____ _________ ---->I AMATEUR I====I AIR I--->I 320 Mhz I_____ I I_________I I_____I I_________I I I______________________________________________I UHF Band: _________ _________ --->I AMATEUR I--->I 900 Mhz I_____ I I_________I I_________I I I___________________________________I Note: Receiving mode of the 340 Mhz Band can be switched from FM to AM by press and hold VFO key then POWER ON. TH-78E RX EXPANSION (OFF) _____ Reset your TH-78E by pressing the I M I key, when powering ON I_____I TH-78E TX EXPANSION Remove the diode D6 from the control unit. New TX ranges after this modification: VHF Band 136.000 - 174.250 Mhz (FM) UHF Band 400.000 - 493.000 Mhz (FM) TH-78E UHF BAND 432-438 Mhz LIMITED RANGE Remove the diode D3 from the control unit. TH-78A/E EXTENDED FUNCTION You can change the frequency range and use various secret function of the TH-78A/E by changing his destination. A secret funcion is available without modification. Destination modification The destination is determined by diodes D2,D3,D5, and D6. Change the destination with reference to table 2. For information about setting the destination by diode, see the destination column of table 2. The diodes are protected by a shield plate. Remove the shield plate, then remove the appropriate diodes. Refere to your schematic diagram TH-78A/E 2/2 Control Unit Board X53-342X-XX A/5 __________________ Cupper shield plate : :/ Table 2 : ___________ : ____________________________ : I I : I I I I I I : I CPU I : I DestinationID2 ID3 ID5 ID6 I : I IC 7 I : I------------I---I---I---I---I : I I : I 0-00 (J) INo INo INo IYesI : I___________I : I------------I---I---I---I---I : _:_ I 0-11 (K) IYesIYesIYesIYesI : I_:_I D1 I------------I---I---I---I---I : I_:_I D2 I 0-21 (M) IYesINo IYesIYesI : I_:_I D3 I------------I---I---I---I---I : I_:_I D4 I 0-22 (M2) IYesINo IYesINo I : I_:_I D5 I------------I---I---I---I---I :________________I_:_I D6 I 0-71 (X) INo IYesINo INo I I------------I---I---I---I---I Control unit I 2-71 (E) INo IYesIYesIYesI I------------I---I---I---I---I I 2-72 (E2) INo IYesIYesINo I I____________I___I___I___I___I Secret functions after modification The following functions are added if you modify the destination. See the appropriate description for details. Frequency range change Change the diodes (D2,D5,D3, and D6) as shown in the destination column of Table 2 . Cross-band repeater _____ _____ Remove D4 and press the I F I key for one second, then the I 0 I key, to turn this I_____I function ON or OFF. I_____I Answerback function (during paging reception) _____ Hold down the I Mhz I key and switch the POWER ON to turn this function I_____I ON or OFF. 300-Mhz band AM/FM switching _____ Hold down the I VFO I key and switch the POWER ON to switch between AM and FM. I_____I VHF expansion band _____ ______ Press the I F I key for one second, then the I BAND I key,to change the band. I_____I I______I UHF expansion band _____ ______ Press the I F I key for one second, then the I BAND I key,to change the band. I_____I I______I Channel display mode _____ Hold down the I 3 I key and switch the POWER ON to change te frequency I_____I display to the memory channel. # If you remove D1, only the channel is displayed. Normally, leave D1 # in. Clone function _____ Hold down the I 0 I key and switch the POWER ON to use this function. I_____I Secret function available without modification.(Game function) _____ _____ Hold down the I M I and I PTT I key and switch the POWER ON to use this function.I_____I I_____I Cross-band repeater When one band becomes busy, the cross-band repeater function retrans- mitts the received signal on the other band. As soon as the BUSY signal for the receiver band goes low, the transceiver enter receive mode on both bands. Note 1: DTTS and paging are not checked. Note 2: If TONE of the transmitter is on, a subtone is output. Note 3: If the transmitter does not output a subtone, CTCSS is checked. Cross-band repeater ON/OFF You can turn the cross-band repeater ON and OFF by pressing the _____ _____ I F I key for one second, then the I 0 I key. I_____I I_____I The dot indicating Mhz on the frequency display (both bands) flashes while the cross-band repeater function is on. Note 1: The cross-band repeater does not turn on during dual watch. Note 2: If you enable the cross-band repeater when the bell function is on, the bell function is turned off and the cross-band repeater function is turned on. You can turn the repeater on only if the bell function for the operation band is off. Note 3: A dedicated jumper is used to select whether to use the cross-band repeater. Note 4: The timeout timer is set to three minutes. Cross-band repeater operation Operation band BUSY band:change band:change _____________________:______________________:______ : : ______ _ :_____________ :_ Non)operation band I I I I I I I I BUSY __I I__I I______I I________I I____ ______ ___ _____________ ___ Operation band I I I I I I I I transmission __I I__I I____I I________I I__ ->I---I<- ->I---I<- 500 ms 500 ms Answerback function If the transmitter pages a receiver, it does not know whether the receiver has received the paging signal. When the answerback function is ON, the receiver returns a code automatically if the paging code matches to indicate that it has received the paging signal. The transmitter can thus confirm that the code it sent was actually received. Operation If the paging code matches and the busy signal goes low, the receiver returns a code. If the paging code does not match, the receiver does not return a code. The answerback function is related to the bell function: if you turn the bell function on when the answerback function is on, the answerback function works; If you turn the bell function off, the answerback function does not work. If the answer- back function is off, only the bell function can be turned on or off. To turn the answerback function on and off, hold down the _____ key and switch the POWER ON. I Mhz I I_____I Note : This function is available only if reception is modified. __________ ______________________ BUSY I I I____________________________________I Receive : _ _ _ _ _ _ _ : code : I I I I I I I I I I I I I I : __________:___I I_I I_I I_I I_I I_I I_I I______:______________________ : : : : : : Paging code : : : :<----------------------->: : ->:---:<-250ms(450/750ms for shift, split channel) : : .....................................: : __________: ___________________ TX ON I I I_______________________________________I : _ _ _ _ _ _ _ : I I I I I I I I I I I I I I __________:___I I_I I_I I_I I_I I_I I_I I_____________________________ Transmit : : : code : : Paging code : : :<----------------------->: ->:---:<-250ms(450/750ms for shift, split channel) ______________ _____________________________ Microphone OFFI I I_________________________I VHF expansion band You can change the reception of AMATEUR band, AIR band, and POLICE band by pressing the _____ key for one second, then the ______ I F I I BAND I I_____I I______I key, when the VHF band is VFO. _______________________________________________ I I Police band I I===================I===========================I I Step I 10, 20, 12.5, 25 Khz I I-------------------I---------------------------I I Frequency range I 300.000 -- 399.995 Mhz I I-------------------I---------------------------I I Initial frequency I 340.000 Mhz I I___________________I___________________________I UHF expansion band You can change the reception of AMATEUR band and CAR TELEPHONE band by pressing the _____ key for one second, then the ______ key, I F I I BAND I I_____I I______I when the UHF band is VFO. _______________________________________________ I I Car telephone I I===================I===========================I I Step I 12.5, 25 Khz I I-------------------I---------------------------I I Frequency range I 800.000 - 949.987.5 Mhz I I-------------------I---------------------------I I Initial frequency I 800.000 Mhz I I___________________I___________________________I Note 1:Program scan cannot be performed over bands. It can only be performed within each band. Note 2:You cannot change the band in MR and CALL modes. Note 3:The AIR band frequency range is shown below. It is contiguous in the VHF amateur band frequency range. Note 4:The initial step is the same as the VHF amateur band step. Note 5:If the AIR band is received as the UHF subband, FM reception is performed. Note 6:The step is the same as the VHF band step. _________________________________________________ I I Air I I===================I=============================I I Step I 5, 10, 15, 20, 12.5, 25 Khz I I-------------------I-----------------------------I I Frequency range I 50.000 - 135.995 Mhz I I___________________I_____________________________I Channel display mode Select the channel mode by cutting D1 on the CONTROL UNIT. If you cut D1 on the CONTROL UNIT, you can use channel display mode only. You cannot change it to normal display mode from the panel. If you do not cut D1 on the CONTROL UNIT, you can change between channel display mode and normal display mode by holding the _____ key and switch the POWER ON. I 3 I I_____I Note :Memory channels for both bands must contain frequencies. If nothing is stored in memory, an error occurs. 73's Wim PE1ACG ############################################################################### ############################################################################### Date: 18 Oct 92 13:16 Message-ID: <0@OE9XPI> From: DD8GR@OE9XPI To: KENWOO@EU Subject: TH-78E expansion Path: PI8EAE!PI8HWB!PI8HRL!PI8AIR!DK0MWX!DB0EAM!DB0DNI!DB0FP ... de DD8GR @ OE9XPI.AUT.EU to KENWOOD @ EU From: DD8GR @ OE9XPI.AUT.EU To: KENWOOD @ EU Date: 18.10.92 Hi out there! Thanks for reading this message! With regards to my previous message on the subject of frequency expan- sion of this HT some days ago, I'll resume what I've found: Following I'll describe the configuration I've found in my HT (factory): ======================================================================== Copper or alike shield ^ I ___ ------------------- I I <--- IC 2 | __________ | I I | I I | I___I __ | I IC 7 I | I I <--- ME 1 socket | I I =| D1 I__I | I__________I =| D2 | =| D3 |________________=| D4 = D5 = D6 In my case the diodes were configured as follows: ------------------------------------------------- D1 D2 D3 D4 D5 D6 closed not present open closed closed open the "open" diodes are present but one side (right side when looked at from the top as above) bent about 45ø upwards. As per the circuit diagram included with the HT the following is possible: Version E E2 D1 open open D3 close close D5 close close D6 close open The way my HT came from the dealer it can receive all the ranges, +/- 50 to 180 Mhz., 400 to 512 and the 300 & 900 Mhz. segments. According to this all that was then needed to do was to close (solder the right side down of D3, I've done this an the HT now has a TX range of 136-172 and 400-512, of course I've tried this with a dummy load. Nothing else has changed, the key layout has also remained, note that the "A" version has a different keyboard layout. This makes it very attractive if you should travel to coutries like the USA where the ranges are somewhat different, the offset at 70 cm. can be changed to +/- 5,0 Mhz. anyway (if you do not know how: press SHIFT at power on then F1 for longer than 1 sec. and SHIFT and you can change the off-set to whatever you want). Proceed at your own risk and remember to always transmit within your allocated frequency range, by the way, a modification like this voids the guarantee (I would suggest that thae manufacturers put DIP switches for things like this in the future...) P.S.: Thanks to Aad, PE1AGP for the submitted information! ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ» ³ ³ º ÛÛ²²±±°° 73's De Axel DD8GR @ OE9XPI.AUT.EU °°±±²²ÛÛ º ³ ³ º ÛÛ²²±±°° Immenstaad a. B., Germany, JN47QQ °°±±²²ÛÛ º ³ ³ ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ ³ ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ ############################################################################### DIODE USE -------------------------------- D 1 = Select CHANNEL MODE D 2 = Select Country destin. D 3 = UHF limit range D 4 = Crossband RPT D 5 = Select County destin. D 6 = EXP. TX MOD EUROPE MATRIX (AIR BAND+300MHZ+900MHZ) = YES D1-D3-D4-D5 NO D2-D6 NOTE: THE DISPLAY SHOW 50 MHZ BUT "REALY" OPERATE FROM 91 MHZ AND UP ! LOW SENSIBILITY UHF & 900 MHz ----------------------------- For a good sensibility perform on the coil L51 and L52 on main board near the BNC socket. For a good sensibility on the extreme of band please repleace the L37 SMD COIL of 0.68 uH whit a 0.56 uH. -------------------------------------------------------------------------- ENABLE BAND 300MHz RX = in VHF push F for 1 sec. and push BAND ENABLE BAND 900MHz RX = in UHF push F for 1 sec. and push BAND NO DOCUMENTATE FUNCTION ======================= REPEATER CROSSBAND: Push key F for 1 second, and the key 0 (please remove the smd diode D4). EXPANSION RX: Push in VHF or UHF the key F for 1 sec, and BAND (remove smd diode D5) in VHF rx is 300-400 MHz in UHF 800-900 MHz. CONFIRM PAGER: Push MHZ and POWER ON the transceiver. You have the confirm whit the bell like the new Standard C-558 ! SHIFT PROGRAM.: Push SHIFT and POWER ON the transceiver. and the F for 1 second and the key SHIFT. You have on display 0.0 with step of 99.9 with step of 0.1. This function is ok for NO-Standard Shift, whitout delete the internal diode country destination matrix ! CLONING DATA: Push key 0 and POWER ON the transceiver (remove the smd diodes D5 D6).All the keys exept only the PTT and Power are not function. Push the PTT for start the cloning whit DTMF. CHANGE SHIFT/SPLIT: Push the SHIFT and POWER ON the transceiver. In Split Mode = you have offset non standard. In Shift Mode = not variable offset. CHANGE FUNZ.CALL: Push the key CALL and POWER ON the transceiver. The key CALL now have two functions: On default (CALLSW) = Function between channel memory and channel call and vfo. In other mode = function between vfo the last memory channel and return at call. GAMES: Push key M and PTT and ON the transceiver, you now have a 2 games, MEMORY GAME and CARD GAME (pocker). At the begin you are in Memory game and the access at the Pocker game is when in Memory game you have over 20 coin ! PLEASE PROTECT OUR LICENSES. DO NOT TRASMIT OUTSIDE OF LEGAL BANDS ! ******************************************************************* TH-78E EXPANSION Press "PTT" + "VFO" then "POWER ON". VHF band: 108-136MHz (AM) / 136-174MHz / 320-390MHz / 405-485MHz Note: In my case I found also 50-179.9875 MHz and 300-399.9875 MHz UHF band: 410-510MHz / 136-174MHz / 800-950MHz Note: In my case I found also 400-511 MHz By pressing "F" key for 1 sec. then press "BAND" key when in the "VFO" mode The VHF band switch from: >> "Amateur" >> "Air" >> "340MHz" and so on The UHF band switch from: >> "Amateur" >> "900MHz" and so on Note: Receiving mode of the 340MHz band can be switched from "FM" to "AM" by press and hold "VFO" key then "POWER ON" ------------------------------------------------------------------------------ TH-78E TX EXPANSION Remove the diode "D6" from the control unit. ------------------------------------------------------------------------------- TH-78E UHF band 432-438 MHz LIMITED RANGE Remove the diode "D3" from the control unit ------------------------------------------------------------------------------- CROSS BAND REPEATER Remove the diode "D4" from the control unit, then press "F" key for 1 sec. and press "0" key. ------------------------------------------------------------------------------- Good Luck ! Aad de PE1AGP @ PI8VNW.#ZH2.NLD.EU ############################################################################### Date: 05 Apr 93 09:31 Message-ID: <0@DB0IZ> From: DL1YDD@DB0IZ To: GERAET@ALLE Subject: Modif. (2) TH78 1/2 Path: PI8EAE!PI8AWT!DB0NDR!DB0AHA!PI8AIR!DK0MWX!DB0IZ de DL1YDD @ DB0IZ.DEU.EU to GERAETE @ ALLE From : WB1E @ K1RQG.ME.USA.NA To : MODS @ ALLUS Date : 921007/0128 Msgid : BF 3616@K1RQG Subject : KENWOOD TH-78A MOD WARNING In the course of performing mods on my Kenwood TH-78A dual band handheld, I've discovered a potential flaw in the case design. While handling my walkie one day (after the mods were done), the display went blank and I could not turn the radio back on. With the radio split in half again, I could turn the radio back on but discovered all the memories were erased. The cause turned out to be some component pins on the front face coming in contact with the square bodies of the two volume/channel/squelch switches, when the case is screwed back together snuggly. I placed small strips of electrical tape on the sides of the switches to insulate, and reassebled; problem solved. Now I have to reprogram the darn thing.... Mark WB1E @ K1RQG.ME The Complete Guide to Undocumented Features of the TH-78A The information contained in this document is derived from many sources. Unfortunately, I have not kept track of everyone who has provided input, but I would like to thank those who have helped me compile this information. This document is probably not complete: Please send any additions or corrections to aviator@athena.mit.edu (Internet) or n1jhw@ka1srd.#ema.ma.usa.na (amateur radio packet) or ma0226@ma1bbs.mawg.ner (Civil Air Patrol packet). I've had one report that the TH-78A is capable of in-band full duplex operation. I've been unable to repeat this on my unit, which only has the CAP/MARS mod perform. Confirmation of this feature would be appreciated. Please Note: I can take no responsibility for any problems which may be caused by attempting to access one of the features described here. This document may be distributed in its original form only, and not via packet radio. 1. Hardware Mods Hardware modifications for the TH-78A are performed by manipulating a series of 6 surface mounted diodes, identified as D1 through D6. The TH-78A block diagram contains a table identifying 7 configurations involving D2, D3, D5, and D6. However, none of the configurations described below are included in that table. To open the radio, follow the instructions on p. 64 of the manual. The two TX/RX busy indicators (LEDs) have rubber seals placed over them. These have a tendency to fall off when opening or closing the radio. The diodes are located on the CPU board, which is mounted inside the front panel of the radio. The CPU board is readily identified by a brass shield covering the CPU, as well as the socket for the ME-1 memory expansion chip. All position references in this document assume that you are looking at the CPU board with the rotary encoders and TX/RX busy indicators at the top. If you have installed the ME-1 EEPROM, I recommend that you temporarily remove it to facilitate access to the diodes. The diodes are located in a vertical row just below the lower right corner of the brass shield. The diodes are numbered sequentially, starting with D1 at the top. The U.S. stock configuration has all diodes in place. The function of D1 is not known at this time. D2, D3, D5, and D6 are thought to control TX and RX ranges. D4 controls cross-band repeat. Before removing a diode, Kenwood recommends unsoldering the brass shield. There are four solder points, one at each corner. The brass shield is attached to the CPU with a small piece of double-sided adhesive tape. An alternate method consists of unsoldering the right side of the appropriate diodes, which are visible underneath the shield, and bending them to approximately a 45 degree angle, forming an open circuit. Early Model Radios Only ======================= CAP/MARS mod: Remove D6 only. Yields RX 118-174 TX 142-152 RX 400-512 TX 425-455 Beyond MARS mod: Remove D5 only. Yields RX 50-180 TX 136-180 RX 300-400 [VHF side only] RX 400-512 TX 400-512 RX 800-950 [UHF side only] Late Model Radios Only ====================== Beyond MARS mod: Remove D3. Also remove jumper W1. Yields RX 50-180 TX 136-180 RX 300-400 [VHF side only] RX 400-512 TX 400-512 RX 800-950 [UHF side only] Note: The frequency ranges include the lower limit, but exclude the upper limit (i.e. 118-174 really means 118.000-173.995). Crossband repeat mod: Remove D4. Apparently, this mod is independent of the D5/D6 mods. 2. Undocumented Features Crossband Repeat: Press F for 1 second, then 0 [requires D4 mod] Repeat the same sequence to disable. Wideband RX: Press F for 1 second, then BAND [requires D5 mod] On the VHF side this yields 300-400 RX, on UHF 800-950 RX. Sample Channels: Press DUAL during power-up Programs some sample frequencies in VHF and UHF memory channels (it's a pain to undo the sample programming). Cloning: Press 0 during power-up [requires D5 or D6 mod] Allows cloning over the air. All keys except PTT and POWER are disabled. Press PTT to send DTMF cloning sequence. Presumably, receiving TH-78A must be in same mode. Toggle SHIFT/SPLIT Mode: Press SHIFT during power-up This is described in the manual, but the documentation is not complete. The TH-78A can operate in two modes: In SPLIT mode, non-standard offsets (i.e. split frequencies) are supported, but the default offset is not programmable. In SHIFT mode, non-standard offsets are not allowed, but the default offset is programmable. To select the default offset, press F for 1 second, then SHIFT. See p. 30 of the manual for details on changing the default offset. Toggle CALL Button Function: Press CALL during power-up. The CALL button can operate in one of two modes. In th default mode (CALLSW), it switches between the call channel and the last memory channel (if in memory recall mode) or last frequency (if in VFO mode). After toggling the CALL button functionality (VMC), it will switch from the VFO to the last memory channel and then back to the CALL channel. ====================================================================== Game Mode: Press M and PTT during power-up [be careful not to accidentally reset the memory (M+POWER)] [Much of this was provided by james@brokaw.lcs.mit.edu] To exit the game mode at any time, press the LAMP key. It is not possible to change the volume, lamp, or frequency settings while in game mode. The top part of the display will show H.00, which represents the high score. The lower part shows a scrolling message, "PRESS ANY KEY". Pushing any key starts a "Follow Simon" type game. The display will briefly show one of the characters "1", "2", "3", or "F". Press the corresponding key. The game consists of repeating the displayed character sequence, whic h increases by one character each round. After you "win" the Simon memory game by getting correctly entering a sequence of twenty characters, the next game is a draw poker game. The way it works is that you choose your bet (from 1 to 10) by pressing 2 to increment the bet and 5 to decrement the bet. Then, press F to deal the five cards. The face value of the cards is displayed, and the suits can be seen at any time by holding down the PTT key. Any number of cards may be discarded, and to select (or deselect) a card for discarding, press the ke ys 1, 2, 3, 4, or 5. If a card is selected for discard, it is displayed "face-down". Press F again to draw new cards. Your new cards will be displayed, and then if your hand is 2-pair or better, the screen will show the rank of your hand on the left (2P for 2-pair, 4K for four-of-a-kind, etc.). On the right the pay- off for that hand will be displayed. Your bet is multiplied by the pay-off factor,and the resulting pile of cash is displayed in the right hand side of the upper screen. (The left hand side of the upper screen contains your table stakes, which are initially 100 coins from wi nning the Simon game.) If you win the poker hand, pressing any key steps into the next stage. If you lose the poker hand, your bet is deducted from your stakes and you are asked to start another poker hand. In the next stage, you are asked "TRYB/S" which means, "Do you want to try double-or-nothing in a guessing game for Big or Small cards?" Press F for yes, press TONE for no. If you say no, your winnings are credited into your stakes and you are asked to start another poker hand. If you say yes, then a single shuffling/incr ementing card is displayed on the left, and three stars are displayed on the right. You have to choose to go for either BIG or SMALL, by pressing 2 or 5. You can keep pressing 2 and 5 to change your mind. When you are ready, you must try to hit the F key to stop the rotating card display, and the card will show, and you will either win, lose, or draw. If you draw, you have to play big/small again, I think. If you lose, your winnings are gone and you can play poker again. If you win, your winnings doub le and you are asked whether you want to play big/small again. The payoffs on the poker are set against you, odds-wise; the double-or-nothing game includes a draw, so the odds are against the player there unless you can time hitting the F key to win more than half the rounds. I haven't managed to do this, so I don't know if there is anything beyond this, all I know is that when the table stakes are exhausted, you go back to playing Simon again. ############################################################################### Date: 05 Apr 93 09:32 Message-ID: <0@DB0IZ> From: DL1YDD@DB0IZ To: GERAET@ALLE Subject: Modif. (2) TH78 2/2 Path: PI8EAE!PI8AWT!DB0NDR!DB0AHA!PI8AIR!DK0MWX!DB0IZ de DL1YDD @ DB0IZ.DEU.EU to GERAETE @ ALLE From: George_Lin@mindlink.bc.ca (George Lin) Newsgroups: rec.radio.amateur.misc Subject: Re: Kenwood TH-78 mods / Game Message-ID: <13077@mindlink.bc.ca> Date: 30 Jun 92 09:38:25 GMT Organization: MIND LINK! - British Columbia, Canada Distribution: world Lines: 125 To "open up" as many feature as possible on the TH78A, remove diodes D4 & D5 (located under the copper shield). This allows the following transmit and receive frequencies RECEIVE TRANSMIT --------------- --------------- VHF BAND -------- 50-135.995 (AM) (NA) 136-179.995 136-179.995 300-399 (AM & FM) (NA) SUB-UHF 400-511.99 400-511.99 UHF BAND -------- 400-511.99 400-511.99 900-949.9875 (NA) SUB-VHF 50-179.995 (FM) 136-179.995 PERSONAL NOTES: I found that marine weather reports at 162.40MHz in my area were received much better on the VHF-SUB band, than on the VHF band. Possible hole? If you are having problems with intermod, try switching BANDS (ie. USING the SUB-VHF rather than the VHF etc.) Cellular Phones are in the 870-890 range, but the frequency increments are every 30kHz. The TH78A will only increment in 25kHz steps at this frequency range, so the exact Cellular channel frequency cannot be tuned in (most of the time). Removing D4 enables the CROSS-BAND REPEATER function. CROSS-BAND REPEATER ------------------- Press [F] key for 1 second, then the [0] (zero) key to turn this function on and off (MHz dot will flash when in repeater mode). ANSWERBACK FUNCTION (during paging reception) --------------------------------------------- Hold down [MHz] key and switch power ON to turn this function ON or OFF. 300 MHz AM/FM SWITCHING ----------------------- Hold down [VFO] key and switch the power ON to switch between AM and FM reception. VHF & UHF EXPANSION ------------------- Press and hold the [F] key for 1 second, then press the [BAND] key in the respective bands. CHANNEL DISPLAY MODE -------------------- Hold down [3] key and switch the power ON. Channels are displayed by number instead of frequency. (NOTE: this function only works when Alpha-Numeric memory is enabled) CLONE FUNCTION -------------- Hold down the [0] and switch the power ON. *** GAME *** (Available without any modifications) -------------------------------------------------- Hold down the [M] and [PTT] keys and switch the power ON. (Be very careful the PTT is depressed or else a memory reset will occur.) 1) Play the memory game. The radio will beep and display one of the following characters: "1, 2, 3, F" (top row of buttons). Radio starts with one character and adds a new one on after every round until 20 characters are reached. You must press the keys in the same sequence they are displayed. When you can follow the radio for 20 characters, then you will win 100 coins and enter the poker game. (Note: I am terrible at this game, so I cheated by writing down the character sequence on paper.) 2) Poker game. (Much more interesting than the first game, IMHO) Place the bet (1 to 10). Increase the bet with the up key [2], decrease the bet with the down key [5]. Press [F] to deal the cards. Cards are (2,3,4,5,6,7,8,9,+,J,K,Q,A NOTE: 10 = "+") Press [PTT] to see the suits. Press numbers 1 through 5 to change the respective cards. Press [F] to deal the new cards. If you win any amount, you can bet for double or nothing. Press [F] to play "BIG or SMALL". Press [LOW] to keep your winnings. BIG or SMALL ------------ Arandom card will be chosen. Push [2] (big) if you think this card is going to be larger than 8. Push [5] (small) if you think this card is going to be less and 8. (if an 8 is drawn, then a tie occurs, and you neither win nor lose) Press [F] to draw the random card. You either double your winnings or lost it all. Press [F] to continue playing Big or Small. Press [LOW] to keep winnings and continue playing poker. Push the [LAMP] key to exit the game mode. Note: While in game mode, receive functions still operate! ---------------------------------------------------------- ----------------------------------- | George Lin | 145.270 MHz | | George_Lin@mindlink | VE7FKU | ----------------------------------- Newsgroups: rec.radio.amateur.misc From: rfc@allegra.att.com (Robert F. Casey) Subject: TH78A mod file, crossband repeat, extended RX/TX, cloning Message-ID: <1992Oct25.051148.8822@allegra.att.com> Organization: AT&T Bell Laboratories, Murray Hill, NJ Date: Sun, 25 Oct 1992 05:11:48 GMT Lines: 156 copied from packet: Msg# TSF Size #Rd Date Time Arrived Seq # Msg ID Route 2182 BF 7214 2 22-Oct 1938z 22-Oct (019609 - 029771WT3V ) [] N2CZF ==> MODS@ALLUSA "TH-78A Modification File" Date: 22 Oct 92 15:38:10 EDT (Thu) From: n2czf@wt3v.nj.usa (Rich Garcia) Message-ID: <029771WT3V> Reply-To: n2czf@wt3v.nj.usa To: mods@allusa Subject: TH-78A Modification File FILENAME:TH-78A.MOD June 25,1992 Revised: October 22, 1992 Modifications for the Kenwood TH-78A Dual Band Micro-HT. By Rich Garcia N2CZF. Packet Via N2CZF@WT3V.NJ.USA Owner assumes all responsibility for modifying or using these modifications!. The following mods will provide for Crossband Repeat and extended receive and transmit on the Kenwood TH-78A HT. I believe other functions are also enabled by these mods. which I have not found yet but I will update the file as news progresses. Diode #4- Crossband Repeat Diode #5- Extended Receive and out of band Transmit. Remove all screws and open radio as explained in the Kenwood manual for installing the memory expansion module. On the back cover you will find the memory expansion module socket and a copper shield to the upper left corner of it. Under this shield their will be a row of SMC diodes which are unmarked in a vertical configuration to the lower right portion covered by the shield. #1 Remove the shield at its four corners with a solder sucker and SMALL! iron. #2 Carefully count down from the 1st diode in the row to the fourth one and remove for crossband repeat. HINT: I found if you BRIEFLY touch the iron to the right side lead while gently pulling up on the SMC diode it should completely come off without needing to apply heat to the other side and further risk board damage. I used a pair of right angle surgical tweezers for this. #3 Just as above you may remove the fifth diode to preform the extended receive and transmit modification. #4 Reset the CPU (yes you will loose all of your programed memories! argh!) by pressing Function for more than one second and then "0". YOU HAVE NOW COMPLETED THE MODIFICATIONS! #5 For 800Mhz go to the UHF band with the band switch and press Function for more than one second quickly following with a press of the Band switch again. 8---.-- will appear. #6 For 300MHz go to the VHF band and repeat as above. Original bands are restored by repeating the "F Band" sequence. MY observations... All original functions have maintained the same which is great. Aircraft band which was accessible before the mod remains with the same characteristics. It seems that VHF-High band has improved a bit on sensivity where it was dead as a dog before the mod (above 155.000MHz) but the 162.000 MHz band where weather radio is is still a bit deaf for reception at any distance but about 20 Miles. This depends on your (or my) terrain and transmitter output power. On UHF all public safety frequencies up to about 500 MHz seem to come in well but sensivity greatly drops from there (we really can't ask for more). Frequencies can be programed in up to the 920MHz ham band but I have no way of measuring sensivity. 800MHz works but the signals are very weak, you must be near the transmitter for reception. Assuming you are in the town or city where the transmissions originate it should work. Transmit is enabled up to and incl. 500MHz but after testing this on a frequency counter I find that a signal is only generated to about 490 MHz, even though the trans. LED shows output in the higher frequencies. Crossband repeat seems to work fine but the audio is unacceptable for use, BE AWARE the radio gets HOT! Prolonged use or use on a busy frequency would not be recommended. Also remember this is a dual band HT please use a proper antenna while in this mode to avoid a high SWR, we should all know better... Right? After first booting up the CPU in the mod I found that the message screen showed "Cloning" so it seems that this radio now has cloning capabilities. After searching I have found that holding the "0" key and powering up the radio will display the clone feature, see below for further explination.This leads me to believe that this HT may have some more "Hidden" features that I am trying to find, some may be useful. Thanks to Gary KC8UD who sent me the following via packet ..... CLONING: The TH-78 can be cloned without cloning cables or special equipment. It is done entirely with RF, and, in fact, can be transmitted over the air, and even via repeaters. This may be extremely useful for those users who do not have the patience to program their own radios themselves. This application would also be useful for clubs and user groups. (However, this can take as long as 50 minutes with the ME-1 expansion module. It is recommended that a dummy load be used to prevent unwanted QRM.) (1) Both radios must be on the same frequency. (2) Activate both radios by pressing the "0" key while turning the power on. The radios will display CLONE. (3) Now, click the PTT of the "master" radio. The radio will transmit in the conomy low power mode. This may take about 4 minutes for fifty channels. hen the data has been transferred, both radios will revert back to the riginal frequency. (4) Turn both radios off and then on again. They will now operate normaly while the slave radio has the same memory contents as the master radio. ** I have not tried the following modification myself, try at your own risk ** *** Rich N2CZF *** FREQUENCY EXPANSION (1) You can receive from 340 - 399.987 Mhz FM by removing chip diode D8 on the ontrol unit. To access this function, press the [F] key for one second, and then the [LOW] key. This toggles between AMATEUR, AIR band (AM) and 360 Mhz. AM and FM modes are selected automatically, depending on frequency. ** Since "F" for a second and "Low" toggles the power output, I wonder ** *** Rich N2CZF *** There is also a couple of arcade type games on the TH-78A. To start the game you pres and hold [PTT] and [M] keys while turning the unit on. The first game is a follow me type game. The radio beeps and shows a sequence of numbers flashing on the screen. You have to match the same sequence on the tone pad. Each time the sequence gets longer by one number. You have to keep remembering the sequence as one gets added each time. Once you get to a certain high score on that game, it breaks into a poker type game. To exit the game mode press the LAMP key at any time. The receiver still works in the game mode and you can adjust volume but no other features. RG> The games seem to work fine and it is interesting that they have inserted that into the programing of the chips. Does anyone know of any further features in the radio be it games or radio functions. 73's Rich N2CZF Bricktown, NJ ============================================================================= Note: I haven't tried or verified this, proceed at your own risk. And do not transmit outside of legal bands! WA2ISE ############################################################################### Type Stat : B$ Datum Tijd : 930405 02:42 Aan : KENWOO @ALLE Afzender : DL3XU Onderwerp : 10m mit TH 78 BID nummer : 0343035DB0HB Path: !PI8MID!ON1CED!ON4AWP!ON6AR!ON1AEO!ON4UBO!DB0IZ!DB0GE!DK0MTV!DB0GV! !DB0EAM!DK0MAV!DB0CEL!DB0CL!DB0HBS!DB0AGM!DB0HB! de dl3xu @ db0hb to kenwood @ alle Mit dem TH 78 auf dem 10m - Relais DF0HHH ! =============================================== Material : TH 78, TM 741, 2x TSU-7 I ) TH 78 vorbereiten : 1.) Zuerst die TSU-7 - Platine einbauen: Geraet oeffnen, Kabel J 301 von beiden Loetpunkten abschneiden, TSU-7 einsetzen (siehe englisches Handbuch), Geraet wieder zusammenbauen. 2.) Band und QRG waehlen erst F, dann TONE druecken ( F NICHT > 1 sec.! ), mit Hauptabstimmknopf gewuenschten CTCSS-Ton einstellen, mit VFO zurueck in VFO-Betrieb 3.) CTCSS aktivieren mit F, dann CTCSS, im Display erscheint CT, desaktivieren: genauso II ) TSU-7 in TM 741 einbauen ---------------------------- 1.) Bedienteil abnehmen, in leeren kleinen Sockel links hinter Bedien- teil TSU-7 einsetzen ( siehe auch englisches Handbuch ) 2.) Bodenplatte abnehmen auf der vorderen kleinen Platine befinden sich drei blaue 0-Ohm- Bruecken: R 58 halb links oben, R 56 Mitte halb rechts und R 60 unten rechts. R 58 ausloeten ( fuer Repeaterbetrieb ) Geraet zusammenbauen 3.) Gewuenschte CTCSS-Toene fuer Sende- und Empfangsband einstellen ( F > 1 sec., dann TONE, Toene einstellen, dann VFO ) ( DF0HHH arbeitet z.Zt. mit 67 Hz ) 4.) CTCSS aktivieren : 2 x TONE druecken III ) Repeater - Modus fuer TM 741 : ------------------------------- 1.) gewuenschte Frequenzen und CTCSS auf beiden Baendern einstellen 2.) TX - Band mit Band-Select (PTT) bestimmen RX - Band mit Control-Select ( Leuchtdiode gruen schalten ) bestimmen 3.) F > 1 sec, dann MUTE druecken ( Display zeigt Punkte zwischen den Zahlen ) 4.) Jetzt kann ich auf der Eingabefrequenz (z.B: 70 cm ) mit dem TH 78 senden, der TM 741 setzt meine Sendung um auf 10 m, und ich hoere die Antwort vom 10m-Relais im 70cm- Handfunkgeraet ! Allerdings gibt es durch die Umsetzung und die Auswertung der CTCSS-Toene eine leichte Verzoegerung von 1-2 sec. zwischen Sende- und Empfangsum- schaltung auf der gesamten Strecke. Da ich auf meiner eigenen Link-Strecke ( z.B.: auf 70 cm ) die CTCSS-Toebe frei waehlen kann, ist der Einstieg geschuetzt. Uebrigens: Beschreibung fuer Einbau der TSU-7 und Betrieb mit CTCSS ist nur in den englischen Hanbuechern erwaehnt ! 73 es 55 beim " linken " de Winni , DL3XU @ DB0HB ----- Einde van bericht 45945 aan KENWOO @ ALLE ----- ############################################################################### Date: 10 Jun 93 15:42 Message-ID: <0@ON4UBO> From: ON9CSK@ON4UBO To: KENWOO@WW Subject: TH78A -> TH78E + MODS Path: PI8EAE!PA3EAE!PI8UTR!PI8ZAA!PI8AIR!ON4UBO de ON9CSK @ ON4UBO.LG.BEL.EU to KENWOOD @ WW TH-78A (U.S.A. version) --> TH78E (European version) MODS. ********************************************************** Hello TH78 user, If you bought a TH78A in the USA you don't have the 1750 Hz repeater tone access, but you can change that ! Apart from the well-known six diodes, the new CPU has 2 green wires. In order to use the TH78A in EU, you must do the following: - First you have to remove D2 for the standard EU bands. - Now control that the 2 green wires and the 5 other diodes are installed (D1, D3, D4, D5 and D6). - If you need band expantion and components location, please see the mods below. Although the TH78A has a special bandpass filter for the US 70cm band, I could not notice a decrease in sensitivity in the EU part of the 70 cm band. There is a function change for 3 knobs; please see below and also p. 6 and 7 of your INSTRUCTION MANUAL. TH-78A --> TH-78E --------------------------- LAMP --> TONE 1750 Hz CALL --> LAMP TONE --> CALL Now, you can choice between the CTCSS tones and the 1750 Hz with the following sequence: F + LAMP (the new TONE !) and then the right rotary encoder to make yur frequency choice. ******************************************************************************* KENWOOD TH-78E MODS ******************* Hello TH-78E user, I recently bought a TH-78E which apparently had a new CPU. You can see this internally. Apart from the well-known six diodes it also has two green wires, indicated on the PCB as W1 and W2. WARNING !!! ----------- In the course of performing mods on my Kenwood TH-78E dual band handheld, I've discovered a potential flaw in the case design. While handling my walkie one day (after the mods were done), the display went blank and I could not turn the radio back on. With the radio split in half again, I could turn the radio back on but discovered all the memories were erased. The cause turned out to be some component pins on the front face coming in contact with the square bodies of the two volume/channel/squelch switches, when the case is screwed back together snuggly. I placed small strips of electrical tape on the sides of the switches to insulate, and reassebled; problem solved. Now I have to reprogram the darn thing.... ############################################################################### The Guide to Undocumented Features of he TH-78E ------------------------------------------------ The information contained in this document is derived from many sources. This document is probably not complete. 1. Hardware Mods ---------------- Hardware modifications for the TH-78E are performed by manipulating 2 green wires and a series of 6 surface mounted diodes, identified as D1 through D6. The TH-78E block diagram contains a table identifying configurations involving D2, D3, D5, and D6. However, none of the configurations described below are included in that table. To open the radio, follow the instructions on p. 64 of the manual. The two TX/RX busy indcators (LEDs) have rubber seals placed over them. These have a tendency to fall off when opening or closing the radio. The diodes and wires are located on the CPU board, which is mounted inside the front panel of the radio. The CPU board is readily identified by a brass shield covering the CPU, as well as the socket for the ME-1 memory expansion chip. All position references in this document assume that you are looking at the CPU board with the rotary encoders and TX/RX busy indicators at the top. If you have installed the ME-1 EEPROM, I recommend that you temporarily remove it to facilitate access to the diodes. The diodes are located in a vertical row just below the lower right corner of the brass shield. The diodes are numbered sequentially, starting with D1 at the top. The E3 configuration has diodes D1, D3, D4, D5 and D6 and the 2 green wires in place. Remove jumper W1 (one of the two green wires). RX is: 50-136 AM, 136-180 FM, 300-400 AM/FM, 400-512 FM (VHF SIDE). 50-180 FM, 400-512 FM, 800-1000 FM (UHF SIDE). TX is: 136-180 FM and 400-512 FM Crossband repeat mod: Remove D4. 2. Software Mod --------------- If you don't need the TX MOD, try the following: Push PTT + VFO and POWER ON. TX is not affected, RX is like above. 3. Undocumented Features ------------------------ Crossband Repeater: Press F for 1 second, then 0 (requires D4 mod). Repeat the same sequence to disable. Cloning: Press 0 during power-up. Allows cloning over the air. All keys except PTT and POWER are disabled. Press PTT to send DTMF cloning sequence. Presumably, receiving TH-78E must be in same mode. Toggle SHIFT/SPLIT Mode: Press SHIFT during power-up. This is described in the manual, but the documentation is not complete. The TH-78E can operate in two modes: In SPLIT mode, non-standard offsets (i.e. split frequencies) are supported, but the default offset is not programmable. In SHIFT mode, non-standard offsets are not allowed, but the default offset is programmable. To select the default offset, press F for 1 second, then SHIFT. See p. 30 of the manual for details on changing the default offset. Toggle CALL Button Function: Press CALL during power-up. The CALL button can operate in one of two modes. In the default mode (CALLSW), it switches between the call channel and the last memory channel (if in memory recall mode) or last requency (if in VFO mode). After toggling the CALL button functionality (VMC), it will switch from the VFO to the last memory channel and then back to the CALL chanel. 300 MHZ AM/FM switching: Hold down VFO key and switch the POWER ON to switch between AM and FM reception. VHF & UHF expansion: Press the F key for 1 second, then press the BAND key. On VHF you have now 300-400 AM/FM RX and on UHF 800-1000 FM RX. Channel display mode: Hold down 3 key and switch the POWER ON. Channels are displayed by number instead of frequency. (NOTE: this function only works when Alpha-Numeric memory is enabled). 4. Considerations ----------------- For some frequencies, the TH-78 will "beep": this is PLL unlock and there is no RX/TX ! For high frequencies, the red TX led will not glow: no TX ! The locking ranges are different on MAIN BAND and SUB BAND. When monitoring 2 VHF freq., the sensitivity of the MAIN VHF BAND is attenuated but VHF SUB BAND is still good. Thus monitor strong VHF signals on VHF MAIN BAND and weak VHF signals on VHF SUB BAND. VHF SUB BAND work only in FM and not in AM. When monitoring (VHF or UHF) out f ham band signals, sensitivity is realy better in SUB BAND. Also the rubber duck antenna has only a good efficiency in the ham frequencies, that's why my preference go to the 37 cm long COMET CH-600MX antenna. Sensitivity in the 959 MHz portable telephone band is low, but good enough to listen the neighbours cordless telephones. When charging PB13 battery, you need 15.5 V on the DC IN TERMINAL to have a charge current of 70 mA (1/10 of C) for 15 H. ******************************************************************************* *** GAME *** (Available without any modifications) -------------------------------------------------- Hold down the M and PTT keys and switch the power ON. (Be very careful the PTT is depressed or else a memory reset will occur.) 1) Play the memory game. The radio will beep and display one of the following characters: "1, 2, 3, F" (top row of buttons). Radio starts with one character and adds a new one on after every round until 20 characters are reached. You must press the keys in the same sequence they are displyed. When you can follow the radio for 20 characters, then you will win 100 coins and enter the poker game. (Note: I am terrible at this game, so I cheated by writing down the character sequence on paper.) 2) Poker game. (Much more interesting than the first game, IMHO) Place the bet (1 to 10). Increase the bet with the up key 2, decrease the bet with the down key 5. Press F to deal the cards. Cards are (2,3,4,5,6,7,8,9,+,J,K,Q,A NOTE: 10 = "+") Press PTT to see the suits. Press numbers 1 through 5 to change the respective cards. Press F to deal the new cards. If you win any amount, you can bet for double or nothing. Press F to play "BIG or SMALL". Press LOW to keep your winnings. BIG or SMALL ------------ Arandom card will be chosen. Push 2 (big) if you think this card is going to be larger than 8. Push 5 (small) if you think this card is going to be less and 8. (if an 8 is drawn, then a tie occurs, and you neither win nor lose) Press F to draw the random card. You either double your winnings or lost it all. Press F to continue playing Big or Small. Press LOW to keep winnings and continue playing poker. Push the LAMP key to exit the game mode. Note: While in game mode, receive functions still operate! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Game Mode: Press M and PTT during power-up (be careful not to accidentally reset the memory (M+POWER)). To exit the game mode at any time, press the LAMP key. It is not possible to change the volume, lamp, or frequency settings while in game mode. The top part of the display will show H.00, which represents the high score. The lower part shows a scrolling message, "PRESS ANY KEY". Pushing any key starts a "Follow Simon" type game. The display will briefly show one of the characters "1", "2", "3", or "F". Press the corresponding key. The game consists of repeating the displayed character sequence, which increases by one character each round. After you "win" the Simon memory game by getting correctly entering a sequence of twenty characters, the next game is a draw poker game. The way it works is that you choose your bet (from 1 to 10) by pressing 2 to increment the bet and 5 to decrement the bet. Then, pressF to deal the five cards. The face value of the cards is displayed, and the suits can be seen at any time by holding down the PTT key. Any number of cards may be discarded, and to select (or deselect) a card for discarding, press the ke ys 1, 2, 3, 4, or 5. If a card is selected for discard, it is displayed "face-down". Press F again to draw new cards. Your new cards will be displayed, and then if your hand is 2-pair or better, the screen will show the rank of your hand on the left (2P for 2-pair, 4K for four-of-a-kind, etc.). On the right the pay- off for that hand will be displayed. Your bet is multiplied by the pay-off factor,and the resulting pile of cash is displayed in the right hand side of the upper screen. (The left hand side of the upper screen contains your table stakes, which are initially 100 coins from wi nning the Simon game.) If you win the poker hand, pressing any key steps into the next stage. If you lose the poker hand, your bet is deducted from your stakes and you are asked to start another poker hand. In the next stage, you are asked "TRYB/S" which means, "Do you want to try double-or-nothing in a guessing game for Big or Small cards?" Press F for yes, press TONE for no. If you say no, your winnings are credited into your stakes and you are asked to start another poker hand. If you say yes, then a single shuffling/incr ementing card is displayed on the left, and three stars are displayed on the right. You have to choose to go for either BIG or SMALL, by pressing 2 or 5. You can keep pressing 2 and 5 to change your mind. When you are ready, you must try to hit the F key to stop the rotating card display, and the card will show, and you will either win, lose, or draw. If you draw, you have to play big/small again, I think. If you lose, your winnings are gone and you can play poker again. If you win, your winnings double and you are asked whether you want to play big/small again. The pyoffs on the poker are set against you, odds-wise; the double-or-nothing game includes a draw, so the odds are against the player there unless you can time hitting the F key to win more than half the rounds. I haven't managed to do this, so I don't know if there is anything beyond this, all I know is that when the table stakes are exhausted, you go back to playing Simon again. ******************************************************************************* 73' and try it at your own risk ! I haven't tried the games. Karl, ON9CSK @ ON1BWP.#BTN.BEL.EU ############################################################################### **** ********************************************************************* **** From: George_Lin@mindlink.bc.ca (George Lin) Newsgroups: rec.radio.amateur.misc Subject: Re: Kenwood TH-78 mods / Game Message-ID: <13077@mindlink.bc.ca> Date: 30 Jun 92 09:38:25 GMT Organization: MIND LINK! - British Columbia, Canada Distribution: world Lines: 125 To "open up" as many feature as possible on the TH78A, remove diodes D4 & D5 (located under the copper shield). This allows the following transmit and receive frequencies RECEIVE TRANSMIT --------------- --------------- VHF BAND -------- 50-135.995 (AM) (NA) 136-179.995 136-179.995 300-399 (AM & FM) (NA) SUB-UHF 400-511.99 400-511.99 UHF BAND -------- 400-511.99 400-511.99 900-949.9875 (NA) SUB-VHF 50-179.995 (FM) 136-179.995 PERSONAL NOTES: I found that marine weather reports at 162.40MHz in my area were received much better on the VHF-SUB band, than on the VHF band. Possible hole? If you are having problems with intermod, try switching BANDS (ie. USING the SUB-VHF rather than the VHF etc.) Cellular Phones are in the 870-890 range, but the frequency increments are every 30kHz. The TH78A will only increment in 25kHz steps at this frequency range, so the exact Cellular channel frequency cannot be tuned in (most of the time). Removing D4 enables the CROSS-BAND REPEATER function. CROSS-BAND REPEATER ------------------- Press [F] key for 1 second, then the [0] (zero) key to turn this function on and off (MHz dot will flash when in repeater mode). ANSWERBACK FUNCTION (during paging reception) --------------------------------------------- Hold down [MHz] key and switch power ON to turn this function ON or OFF. 300 MHz AM/FM SWITCHING ----------------------- Hold down [VFO] key and switch the power ON to switch between AM and FM reception. VHF & UHF EXPANSION ------------------- Press and hold the [F] key for 1 second, then press the [BAND] key in the respective bands. CHANNEL DISPLAY MODE -------------------- Hold down [3] key and switch the power ON. Channels are displayed by number instead of frequency. (NOTE: this function only works when Alpha-Numeric memory is enabled) CLONE FUNCTION -------------- Hold down the [0] and switch the power ON. *** GAME *** (Available without any modifications) -------------------------------------------------- Hold down the [M] and [PTT] keys and switch the power ON. (Be very careful the PTT is depressed or else a memory reset will occur.) 1) Play the memory game. The radio will beep and display one of the following characters: "1, 2, 3, F" (top row of buttons). Radio starts with one character and adds a new one on after every round until 20 characters are reached. You must press the keys in the same sequence they are displayed. When you can follow the radio for 20 characters, then you will win 100 coins and enter the poker game. (Note: I am terrible at this game, so I cheated by writing down the character sequence on paper.) 2) Poker game. (Much more interesting than the first game, IMHO) Place the bet (1 to 10). Increase the bet with the up key [2], decrease the bet with the down key [5]. Press [F] to deal the cards. Cards are (2,3,4,5,6,7,8,9,+,J,K,Q,A NOTE: 10 = "+") Press [PTT] to see the suits. Press numbers 1 through 5 to change the respective cards. Press [F] to deal the new cards. If you win any amount, you can bet for double or nothing. Press [F] to play "BIG or SMALL". Press [LOW] to keep your winnings. BIG or SMALL ------------ A random card will be chosen. Push [2] (big) if you think this card is going to be larger than 8. Push [5] (small) if you think this card is going to be less and 8. (if an 8 is drawn, then a tie occurs, and you neither win nor lose) Press [F] to draw the random card. You either double your winnings or lost it all. Press [F] to continue playing Big or Small. Press [LOW] to keep winnings and continue playing poker. Push the [LAMP] key to exit the game mode. Note: While in game mode, receive functions still operate! ---------------------------------------------------------- ----------------------------------- | George Lin | 145.270 MHz | | George_Lin@mindlink | VE7FKU | ----------------------------------- Copied from the QRZ! Windows Ham Radio CDROM **** **** ********************************************************************* **** SP TMP @IW3GRX Aclune modifiche per il TH78 **** **** ********************************************************************* **** Newsgroups: rec.radio.amateur.misc From: rfc@allegra.att.com (Robert F. Casey) Subject: TH78A mod file, crossband repeat, extended RX/TX, cloning Message-ID: <1992Oct25.051148.8822@allegra.att.com> Organization: AT&T Bell Laboratories, Murray Hill, NJ Date: Sun, 25 Oct 1992 05:11:48 GMT Lines: 156 copied from packet: Msg# TSF Size #Rd Date Time Arrived Seq # Msg ID Route 2182 BF 7214 2 22-Oct 1938z 22-Oct (019609 - 029771WT3V ) [] N2CZF ==> MODS@ALLUSA "TH-78A Modification File" Date: 22 Oct 92 15:38:10 EDT (Thu) From: n2czf@wt3v.nj.usa (Rich Garcia) Message-ID: <029771WT3V> Reply-To: n2czf@wt3v.nj.usa To: mods@allusa FILENAME:TH-78A.MOD June 25,1992 Revised: October 22, 1992 Modifications for the Kenwood TH-78A Dual Band Micro-HT. By Rich Garcia N2CZF. Packet Via N2CZF@WT3V.NJ.USA Owner assumes all responsibility for modifying or using these modifications!. The following mods will provide for Crossband Repeat and extended receive and transmit on the Kenwood TH-78A HT. I believe other functions are also enabled by these mods. which I have not found yet but I will update the file as news progresses. Diode #4- Crossband Repeat Diode #5- Extended Receive and out of band Transmit. Remove all screws and open radio as explained in the Kenwood manual for installing the memory expansion module. On the back cover you will find the memory expansion module socket and a copper shield to the upper left corner of it. Under this shield their will be a row of SMC diodes which are unmarked in a vertical configuration to the lower right portion covered by the shield. #1 Remove the shield at its four corners with a solder sucker and SMALL! iron. #2 Carefully count down from the 1st diode in the row to the fourth one and remove for crossband repeat. HINT: I found if you BRIEFLY touch the iron to the right side lead while gently pulling up on the SMC diode it should completely come off without needing to apply heat to the other side and further risk board damage. I used a pair of right angle surgical tweezers for this. #3 Just as above you may remove the fifth diode to preform the extended receive and transmit modification. #4 Reset the CPU (yes you will loose all of your programed memories! argh!) by pressing Function for more than one second and then "0". YOU HAVE NOW COMPLETED THE MODIFICATIONS! #5 For 800Mhz go to the UHF band with the band switch and press Function for more than one second quickly following with a press of the Band switch again. 8---.-- will appear. #6 For 300MHz go to the VHF band and repeat as above. Original bands are restored by repeating the "F Band" sequence. MY observations... All original functions have maintained the same which is great. Aircraft band which was accessible before the mod remains with the same characteristics. It seems that VHF-High band has improved a bit on sensivity where it was dead as a dog before the mod (above 155.000MHz) but the 162.000 MHz band where weather radio is is still a bit deaf for reception at any distance but about 20 Miles. This depends on your (or my) terrain and transmitter output power. On UHF all public safety frequencies up to about 500 MHz seem to come in well but sensivity greatly drops from there (we really can't ask for more). Frequencies can be programed in up to the 920MHz ham band but I have no way of measuring sensivity. 800MHz works but the signals are very weak, you must be near the transmitter for reception. Assuming you are in the town or city where the transmissions originate it should work. Transmit is enabled up to and incl. 500MHz but after testing this on a frequency counter I find that a signal is only generated to about 490 MHz, even though the trans. LED shows output in the higher frequencies. Crossband repeat seems to work fine but the audio is unacceptable for use, BE AWARE the radio gets HOT! Prolonged use or use on a busy frequency would not be recommended. Also remember this is a dual band HT please use a proper antenna while in this mode to avoid a high SWR, we should all know better... Right? After first booting up the CPU in the mod I found that the message screen showed "Cloning" so it seems that this radio now has cloning capabilities. After searching I have found that holding the "0" key and powering up the radio will display the clone feature, see below for further explination.This leads me to believe that this HT may have some more "Hidden" features that I am trying to find, some may be useful. Thanks to Gary KC8UD who sent me the following via packet ..... CLONING: The TH-78 can be cloned without cloning cables or special equipment. It is done entirely with RF, and, in fact, can be transmitted over the air, and even via repeaters. This may be extremely useful for those users who do not have the patience to program their own radios themselves. This application would also be useful for clubs and user groups. (However, this can take as long as 50 minutes with the ME-1 expansion module. It is recommended that a dummy load be used to prevent unwanted QRM.) (1) Both radios must be on the same frequency. (2) Activate both radios by pressing the "0" key while turning the power on. The radios will display CLONE. (3) Now, click the PTT of the "master" radio. The radio will transmit in the conomy low power mode. This may take about 4 minutes for fifty channels. hen the data has been transferred, both radios will revert back to the riginal frequency. (4) Turn both radios off and then on again. They will now operate normaly while the slave radio has the same memory contents as the master radio. ** I have not tried the following modification myself, try at your own risk ** *** Rich N2CZF *** FREQUENCY EXPANSION (1) You can receive from 340 - 399.987 Mhz FM by removing chip diode D8 on the ontrol unit. To access this function, press the [F] key for one second, and then the [LOW] key. This toggles between AMATEUR, AIR band (AM) and 360 Mhz. AM and FM modes are selected automatically, depending on frequency. ** Since "F" for a second and "Low" toggles the power output, I wonder ** *** Rich N2CZF *** There is also a couple of arcade type games on the TH-78A. To start the game you pres and hold [PTT] and [M] keys while turning the unit on. The first game is a follow me type game. The radio beeps and shows a sequence of numbers flashing on the screen. You have to match the same sequence on the tone pad. Each time the sequence gets longer by one number. You have to keep remembering the sequence as one gets added each time. Once you get to a certain high score on that game, it breaks into a poker type game. To exit the game mode press the LAMP key at any time. The receiver still works in the game mode and you can adjust volume but no other features. RG> The games seem to work fine and it is interesting that they have inserted that into the programing of the chips. Does anyone know of any further features in the radio be it games or radio functions. 73's Rich N2CZF Bricktown, NJ ============================================================================= Note: I haven't tried or verified this, proceed at your own risk. And do not transmit outside of legal bands! WA2ISE Copied from the QRZ! Windows Ham Radio CDROM **** **** ********************************************************************* **** SP TMP @IW3GRX Aclune modifiche per il TH78 **** **** ********************************************************************* **** Subject: More TH 78 Mods Hello all, This is again the TH-78 mods i archived, original is from PE1ACG @ ON4UBO i received on packet. If you have other mods, please send them to me to complete my archives, THANKS. Frederic, FC1JSO @ stna7.stna.dgac.fr ------------------------------------------------------------------ SECRET FUNCTION MANUAL OF THE KENWOOD TH-78x PORTO TH-78E RX EXPANSION (ON) Press PTT + VFO, then POWER ON. New RX ranges after this modification: VHF Band 50 - 136 Mhz only AM) 136 - 174 Mhz (only FM) 320 - 390 Mhz (AM + FM) see note below. UHF Band 405 - 510 Mhz (only FM) 800 - 950 Mhz (only FM) VHF Band: _________ _____ _________ ---->I AMATEUR I====I AIR I--->I 320 Mhz I_____ I I_________I I_____I I_________I I I______________________________________________I UHF Band: _________ _________ --->I AMATEUR I--->I 900 Mhz I_____ I I_________I I_________I I I___________________________________I Note: Receiving mode of the 340 Mhz Band can be switched fr{m FM to AM by press and hold VFO key then POWER ON. TH-78E RX EXPANSION (OFF) _____ Reset your TH-78E by pressing the I M I key, when powering ON I_____I TH-78E TX EXPANSION Remove the diode D6 from the control unit. New TX ranges after this modification: VHF Band 136.000 - 174.250 Mhz (FM) UHF Band 400.000 - 493.000 Mhz (FM) TH-78E UHF BAND 432-438 Mhz LIMITED RANGE Remove the diode D3 from the control unit. TH-78A/E EXTENDED FUNCTION You can change the frequency range and use various secret function of the TH-78A/E by changing his destination. A secret funcion is available without modification. Destination modification The destination is determined by diodes D2,D3,D5, and D6. Change the destination with reference to table 2. For information about setting the destination by diode, see the destination column of table 2. The diodes are protected by a shield plate. Remove the shield plate, then remove the appropriate diodes. Refere to your schematic diagram TH-78A/E 2/2 Control Unit Board X53-342X-XX A/5 __________________ Cupper shield plate : :/ Table 2 : ___________ : ____________________________ : I I : I I I I I I : I CPU I : I DestinationID2 ID3 ID5 ID6 I : I IC 7 I : I------------I---I---I---I---I : I I : I 0-00 (J) INo INo INo IYesI : I___________I : I------------I---I---I---I---I : _:_ I 0-11 (K) IYesIYesIYesIYesI : I_:_I D1 I------------I---I---I---I---I : I_:_I D2 I 0-21 (M) IYesINo IYesIYesI : I_:_I D3 I------------I---I---I---I---I : I_:_I D4 I 0-22 (M2) IYesINo IYesINo I : I_:_I D5 I------------I---I---I---I---I :________________I_:_I D6 I 0-71 (X) INo IYesINo INo I I------------I---I---I---I---I Control unit I 2-71 (E) INo IYesIYesIYesI I------------I---I---I---I---I I 2-72 (E2) INo IYesIYesINo I I____________I___I___I___I___I Secret functions after modification The following functions are added if you modify the destination. See the appropriate description for details. Frequency range change Change the diodes (D2,D3,D5, and D6) as shown in the destination column of Table 2. Cross-band repeater _____ _____ Remove D4 and press the I F I key for one second, then the I 0 I key, to turn this I_____I function ON or OFF. I_____I Answerback function (during paging reception) _____ Hold down the I Mhz I key and switch the POWER ON to turn this function I_____I ON or OFF. 300-Mhz band AM/FM switching _____ Hold down the I VFO I key and switch the POWER ON to switch between AM and FM. I_____I VHF expansion band _____ ______ Press the I F I key for one second, then the I BAND I key,to change the band. I_____I I______I UHF expansion band _____ ______ Press the I F I key for one second, then the I BAND I key,to change the band. I_____I I______I Channel display mode _____ Hold down the I 3 I key and switch the POWER ON to change te frequency I_____I display to the memory channel. # If you remove D1, only the channel is displayed. Normally, leave D1 # in. Clone function _____ Hold down the I 0 I key and switch the POWER ON to use this function. I_____I Secret function available without modification.(Game function) _____ _____ Hold down the I M I and I PTT I key and switch the POWER ON to use this function.I_____I I_____I Cross-band repeater When one band becomes busy, the cross-band repeater function retrans- mitts the received signal on the other band. As soon as the BUSY signal for the receiver band goes low, the transceiver enter receive mode on both bands. Note 1: DTTS and paging are not checked. Note Y: If TONE of the transmitter is on, a subtone is output. Note 3: If the transmitter does not output a subtone, CTCSS is checked. Cross-band repeater ON/OFF You can turn the cross-band repeater ON and OFF by pressing the _____ _____ I F I key for one second, then the I 0 I key. I_____I I_____I The dot indicating Mhz on the frequency display (both bands) flashes while the cross-band repeater function is on. Note 1: The cross-band repeater does not turn on during dual watch. Note 2: If you enable the cross-band repeater when the bell function is on, the bell function is turned off and the cross-band repeater function is turned on. You can turn the repeater on only if the bell function for the operation band is off. Note 3: A dedicated jumper is used to select whether to use the cross-band repeater. Note 4: The timeout timer is set to three minutes. Cross-band repeater operation Operation band BUSY band:change band:change _____________________:_______}______________:______ : : ______ _ :_____________ :_ Non)operation band I I I I I I I I BUSY __I I__I I______I I________I I____ ______ ___ _____________ ___ Operation band I I I I I I I I transmission __I I__I I____I I________I I__ ->I---I<- ->I---I<- 500 ms 500 ms Answerback function If the transmitter pages a receiver, it does not know whether the receiver has received the paging signal. When the answerback function is ON, the receiver returns a code automatically if the paging code matches to indicate that it has received the paging signal. The transmitter can thus confirm that the code it sent was actually received. Operation If the paging code matches and the busy signal goes low, the receiver returns a code. If the paging code does not match, the receiver does not return a code. The answerback function is related to the bell function: if you turn the bell function on when the answerback function is on, the answerback function works; If you turn the bell function off, the answerback function does not work. If the answer- back function is off, only the bell function can be turned on or off. To turn the answerback function on and off, hold down the _____ key and switch the POWER ON. I Mhz I I_____I Note : This function is available only if reception is modified. __________ ______________________ BUSY I I I____________________________________I Receive : _ _ _ _ _ _ _ : code : I I I I I I I I I I I I I I : __________:___I I_I I_I I_I I_I I_I I_I I______:______________________ : : : : : : Paging code : : : :<----------------------->: : ->:---:<-250ms(450/750ms for shift, split channel) : : .....................................: : __________: ___________________ TX ON I I I_______________________________________I : _ _ _ _ _ _ _ : I I I I I I I I I I I I I I __________:___I I_I I_I I_I I_I I_I I_I I_____________________________ Transmit : : : code : : Paging code : : :<----------------------->: ->:---:<-250ms(450/750ms for shift, split channel) ______________ _____________________________ Microphone OFFI I I_________________________I VHF expansion band You can change the reception of AMATEUR band, AIR band, and POLICE band by pressing the _____ key for one second, then the ______ I F I I BAND I I_____I I______I key, when the VHF band is VFO. _______________________________________________ I I Police band I I===================I===========================I I Step I 10, 20, 12.5, 25 Khz I I-------------------I---------------------------I I Frequency range I 300.000 -- 399.995 Mhz I I-------------------I---------------------------I I Initial frequency I 340.000 Mhz I I___________________I___________________________I UHF expansion band You can change the reception of AMATEUR band and CAR TELEPHONE band by pressing the _____ key for one second, then the ______ key, I F I I BAND I I_____I I______I when the UHF band is VFO. _______________________________________________ I I Car telephone I I===================I===========================I I Step I 12.5, 25 Khz I I-------------------I---------------------------I I Frequency range I 800.000 - 949.987.5 Mhz I I-------------------I---------------------------I I Initial frequency I 800.000 Mhz I I___________________I___________________________I Note 1:Program scan cannot be performed over bands. It can only be performed within each band. Note 2:You cannot change the band in MR and CALL modes. Note 3:The AIR band frequency range is shown below. It is contiguous in the VHF amateur band frequency range. Note 4:The initial step is the same as the VHF amateur band step. Note 5:If the AIR band is received as the UHF subband, FM reception is performed. Note 6:The step is the same as the VHF band step. _________________________________________________ I I Air I I===================I=============================I I Step I 5, 10, 15, 20, 12.5, 25 Khz I I-------------------I-----------------------------I I Frequency range I 50.000 - 135.995 Mhz I I___________________I_____________________________I Channel display mode Select the channel mode by cutting D1 on the CONTROL UNIT. If you cut D1 on the CONTROL UNIT, you can use channel display mode only. You cannot change it to normal display mode from the panel. If you do not cut D1 on the CONTROL UNIT, you can change between channel display mode and normal display mode by holding the _____ key and switch the POWER ON. I 3 I I_____I Note :Memory channels for both bands must contain frequencies. If nothing is stored in memory, an error occurs. ------------------------------------------------------------------- Have fun... Bye Copied from the QRZ! Windows Ham Radio CDROM **** **** ********************************************************************* **** SP TMP @IW3GRX Aclune modifiche per il TH78 **** **** ********************************************************************* **** From : WB1E @ K1RQG.ME.USA.NA To : MODS @ ALLUS Date : 921007/0128 Msgid : BF 3616@K1RQG Subject: KENWOOD TH-78A MOD WARNING In the course of performing mods on my Kenwood TH-78A dual band handheld, I've discovered a potential flaw in the case design. While handling my walkie one day (after the mods were done), the display went blank and I could not turn the radio back on. With the radio split in half again, I could turn the radio back on but discovered all the memories were erased. The cause turned out to be some component pins on the front face coming in contact with the square bodies of the two volume/channel/squelch switches, when the case is screwed back together snuggly. I placed small strips of electrical tape on the sides of the switches to insulate, and reassembled; problem solved. Now I have to reprogram the darn thing.... Mark WB1E @ K1RQG.ME Copied from the QRZ! Windows Ham Radio CDROM **** **** ********************************************************************* **** SP TMP @IW3GRX Aclune modifiche per il TH78 **** **** ********************************************************************* **** Newsgroups: rec.radio.info From: wa2ise@cbnewsb.cb.att.com (robert.f.casey) Subject: TH78 mods for newer radios Message-ID: <1993Feb11.024318.5494@cbfsb.cb.att.com> Keywords: mods Sender: news@cbfsb.cb.att.com Organization: AT&T Date: Thu, 11 Feb 1993 02:43:18 GMT Approved: rec-radio-info@ve6mgs.ampr.ab.ca Lines: 81 From: Brendan_Hoar@notes.pw.com #Subject: Newer TH78A modifications This contains the mod information for the NEWER Kenwood TH78A. ------------------------------------------------------------------------- From: gwalsh@kilroy.Jpl.Nasa.Gov (Gerald J. Walsh) Date: Far too long ago. >I have a friend who just purchased a TH-78A and tried the mods that, by >now, we all have a copy of. He says that his radio has two green wires >near the diodes that are, "just asking to be cut"! From the >experimenting that he has done, cutting one wire is equivalent to >removing D5 and cutting the other green wire is equivalent to cutting >D6. I followed the traces by sight and I would agree with you. >With the "CAP/Mars mod" completed (remove D6 or cut the green wire) he ^lower (W2) >does get the expanded RX range, but he gets no TX capability outside >the amateur band. > >Alternatively, > >With the "Beyond MARS mod" completed (remove D5 or cut the other green >wire) he gets the full RX capability and the extended TX capability for >the CAP/Mars mod, not the full TX capability expected!? > >BOTTOM LINE: > >Is anyone aware of a change in the mods for later versions of the >TH-78A? We are not able to fully expand the TX capability of this >TH-78A. We compared (by voice) the mods we made with another ham who >modified his. We did everything properly.... I just got the ARTSCI 5A techmod book. They replaced the page that contains the Alignment controls for the TH-78A with a mod page for 'Later Model (with green jumpers)'. I haven't done a whole lot of experimenting, but I think the list below is true. I've removed D3 D4 and D6 and have the associated capabilities. Assuming that D1-D6 are all installed: Remove D3 = Wide band xmit (maybe wide band rcv in addition) Remove D4 = Cross band repeat Remove D5 (or W1) = Mars/CAP Remove D6 (or W2) = Wide band rcv The book doesn't seem to indicate that D6 is necessary for wide band receive, so try removing only D3 (and D4 if you want) and see if you get all the capabilities. If not, then remove D6 too. D5 has priority over D3, so DO NOT REMOVE D5 if you want full xmit. I had already made the mods for the OLD MODEL (which included the removal of D5) and had to resolder D5. Left VFO Right VFO 50.000-85.2x (with beep) 50.000-110.xxx (with beep) 85.2x-179.995 110.xxx-179.995 300.00-399.975 400.000-511.9875 400.000-511.9875 800.00-999.9875 xxx is variable. My guess is the beep is some sort of error notation of some kind, but what? Someone, somewhere said it has something to do with the PLL... At this time, I can't do the xmit testing since I don't have a dummy load here. We had a dummy load when we were testing the mod from the 5A book and the xmit opened up to much more than the MARS/CAP mod allowed. Brendan (No call yet - passed Tech exam on Jan 3rd) ======================================================================== Note: I haven't tried or verified this, proceed at your own risk. And DO NOT transmit outside of legal bands! WA2ISE **** **** ********************************************************************* **** Msg Nr. : 192984 Da : IW3GRX Per : TEMP Tipo/status : PN Data/ora : 0521/1521 Dimensione :109363 Bid (Mid) : 61912_IW3GRX Titolo : Alcune modifiche per il TH78 Date: 07 Nov 92 14:25 Message-ID: <0@ON4UBO> From: PE1ACG@ON4UBO To: TH78@EU Subject: th78 secret function manual 1/6 Path: PI8EAE!PA0SCH!IK7GFP!IK2DFZ!IW2DNI!IW2GKO!I5SGG!4X1RU ... de PE1ACG @ ON4UBO SECRET FUNCTION MANUAL OF THE KENWOOD TH-78x PORTO TH-78E RX EXPANSION (ON) Press PTT + VFO, then POWER ON. New RX ranges after this modification: VHF Band 50 - 136 Mhz (only AM) 136 - 174 Mhz (only FM) 320 - 390 Mhz (AM + FM) see note below. UHF Band 405 - 510 Mhz (only FM) 800 - 950 Mhz (only FM) VHF Band: _________ _____ _________ ---->I AMATEUR I====I AIR I--->I 320 Mhz I_____ I I_________I I_____I I_________I I I______________________________________________I UHF Band: _________ _________ --->I AMATEUR I--->I 900 Mhz I_____ I I_________I I_________I I I___________________________________I Note: Receiving mode of the 340 Mhz Band can be switched from FM to AM by press and hold VFO key then POWER ON. TH-78E RX EXPANSION (OFF) _____ Reset your TH-78E by pressing the I M I key, when powering ON I_____I TH-78E TX EXPANSION Remove the diode D6 from the control unit. New TX ranges after this modification: VHF Band 136.000 - 174.250 Mhz (FM) UHF Band 400.000 - 493.000 Mhz (FM) TH-78E UHF BAND 432-438 Mhz LIMITED RANGE Remove the diode D3 from the control unit. TH-78A/E EXTENDED FUNCTION You can change the frequency range and use various secret function of the TH-78A/E by changing his destination. A secret funcion is available without modification. Destination modification The destination is determined by diodes D2,D3,D5, and D6. Change the destination with reference to table 2. For information about setting the destination by diode, see the destination column of table 2. The diodes are protected by a shield plate. Remove the shield plate, then remove the appropriate diodes. Refere to your schematic diagram TH-78A/E 2/2 Control Unit Board X53-342X-XX A/5 - 1 - __________________ Cupper shield plate : :/ Table 2 : ___________ : ____________________________ : I I : I I I I I I : I CPU I : I DestinationID2 ID3 ID5 ID6 I : I IC 7 I : I------------I---I---I---I---I : I I : I 0-00 (J) INo INo INo IYesI : I___________I : I------------I---I---I---I---I : _:_ I 0-11 (K) IYesIYesIYesIYesI : I_:_I D1 I------------I---I---I---I---I : I_:_I D2 I 0-21 (M) IYesINo IYesIYesI : I_:_I D3 I------------I---I---I---I---I : I_:_I D4 I 0-22 (M2) IYesINo IYesINo I : I_:_I D5 I------------I---I---I---I---I :________________I_:_I D6 I 0-71 (X) INo IYesINo INo I I------------I---I---I---I---I Control unit I 2-71 (E) INo IYesIYesIYesI I------------I---I---I---I---I I 2-72 (E2) INo IYesIYesINo I I____________I___I___I___I___I Secret functions after modification The following functions are added if you modify the destination. See the appropriate description for details. Frequency range change Change the diodes (D2,D5,D3, and D6) as shown in the destination column of Table 2 . Cross-band repeater _____ _____ Remove D4 and press the I F I key for one second, then the I 0 I key, to turn this I_____I function ON or OFF. I_____I Answerback function (during paging reception) _____ Hold down the I Mhz I key and switch the POWER ON to turn this function I_____I ON or OFF. 300-Mhz band AM/FM switching _____ Hold down the I VFO I key and switch the POWER ON to switch between AM and FM. I_____I VHF expansion band _____ ______ Press the I F I key for one second, then the I BAND I key,to change the band. I_____I I______I UHF expansion band _____ ______ Press the I F I key for one second, then the I BAND I key,to change the band. I_____I I______I - 2 - Channel display mode _____ Hold down the I 3 I key and switch the POWER ON to change te frequency I_____I display to the memory channel. # If you remove D1, only the channel is displayed. Normally, leave D1 # in. Clone function _____ Hold down the I 0 I key and switch the POWER ON to use this function. I_____I Secret function available without modification.(Game function) _____ _____ Hold down the I M I and I PTT I key and switch the POWER ON to use this function.I_____I I_____I Cross-band repeater When one band becomes busy, the cross-band repeater function retrans- mitts the received signal on the other band. As soon as the BUSY signal for the receiver band goes low, the transceiver enter receive mode on both bands. Note 1: DTTS and paging are not checked. Note 2: If TONE of the transmitter is on, a subtone is output. Note 3: If the transmitter does not output a subtone, CTCSS is checked. Cross-band repeater ON/OFF You can turn the cross-band repeater ON and OFF by pressing the _____ _____ I F I key for one second, then the I 0 I key. I_____I I_____I The dot indicating Mhz on the frequency display (both bands) flashes while the cross-band repeater function is on. Note 1: The cross-band repeater does not turn on during dual watch. Note 2: If you enable the cross-band repeater when the bell function is on, the bell function is turned off and the cross-band repeater function is turned on. You can turn the repeater on only if the bell function for the operation band is off. Note 3: A dedicated jumper is used to select whether to use the cross-band repeater. Note 4: The timeout timer is set to three minutes. - 3 - Cross-band repeater operation Operation band BUSY band:change band:change _____________________:______________________:______ : : ______ _ :_____________ :_ Non)operation band I I I I I I I I BUSY __I I__I I______I I________I I____ ______ ___ _____________ ___ Operation band I I I I I I I I transmission __I I__I I____I I________I I__ ->I---I<- ->I---I<- 500 ms 500 ms Answerback function If the transmitter pages a receiver, it does not know whether the receiver has received the paging signal. When the answerback function is ON, the receiver returns a code automatically if the paging code matches to indicate that it has received the paging signal. The transmitter can thus confirm that the code it sent was actually received. Operation If the paging code matches and the busy signal goes low, the receiver returns a code. If the paging code does not match, the receiver does not return a code. The answerback function is related to the bell function: if you turn the bell function on when the answerback function is on, the answerback function works; If you turn the bell function off, the answerback function does not work. If the answer- back function is off, only the bell function can be turned on or off. To turn the answerback function on and off, hold down the _____ key and switch the POWER ON. I Mhz I I_____I Note : This function is available only if reception is modified. - 4 - __________ ______________________ BUSY I I I____________________________________I Receive : _ _ _ _ _ _ _ : code : I I I I I I I I I I I I I I : __________:___I I_I I_I I_I I_I I_I I_I I______:______________________ : : : : : : Paging code : : : :<----------------------->: : ->:---:<-250ms(450/750ms for shift, split channel) : : .....................................: : __________: ___________________ TX ON I I I_______________________________________I : _ _ _ _ _ _ _ : I I I I I I I I I I I I I I __________:___I I_I I_I I_I I_I I_I I_I I_____________________________ Transmit : : : code : : Paging code : : :<----------------------->: ->:---:<-250ms(450/750ms for shift, split channel) ______________ _____________________________ Microphone OFFI I I_________________________I VHF expansion band You can change the reception of AMATEUR band, AIR band, and POLICE band by pressing the _____ key for one second, then the ______ I F I I BAND I I_____I I______I key, when the VHF band is VFO. _______________________________________________ I I Police band I I===================I===========================I I Step I 10, 20, 12.5, 25 Khz I I-------------------I---------------------------I I Frequency range I 300.000 -- 399.995 Mhz I I-------------------I---------------------------I I Initial frequency I 340.000 Mhz I I___________________I___________________________I - 5 - UHF expansion band You can change the reception of AMATEUR band and CAR TELEPHONE band by pressing the _____ key for one second, then the ______ key, I F I I BAND I I_____I I______I when the UHF band is VFO. _______________________________________________ I I Car telephone I I===================I===========================I I Step I 12.5, 25 Khz I I-------------------I---------------------------I I Frequency range I 800.000 - 949.987.5 Mhz I I-------------------I---------------------------I I Initial frequency I 800.000 Mhz I I___________________I___________________________I Note 1:Program scan cannot be performed over bands. It can only be performed within each band. Note 2:You cannot change the band in MR and CALL modes. Note 3:The AIR band frequency range is shown below. It is contiguous in the VHF amateur band frequency range. Note 4:The initial step is the same as the VHF amateur band step. Note 5:If the AIR band is received as the UHF subband, FM reception is performed. Note 6:The step is the same as the VHF band step. _________________________________________________ I I Air I I===================I=============================I I Step I 5, 10, 15, 20, 12.5, 25 Khz I I-------------------I-----------------------------I I Frequency range I 50.000 - 135.995 Mhz I I___________________I_____________________________I Channel display mode Select the channel mode by cutting D1 on the CONTROL UNIT. If you cut D1 on the CONTROL UNIT, you can use channel display mode only. You cannot change it to normal display mode from the panel. If you do not cut D1 on the CONTROL UNIT, you can change between channel display mode and normal display mode by holding the _____ key and switch the POWER ON. I 3 I I_____I Note :Memory channels for both bands must contain frequencies. If nothing is stored in memory, an error occurs. 73's Wim PE1ACG - 6 - PE1AGP de PI8EAE-mbx: on #1 Users: 2 H=Help B=Bye D,?,I,J,K,L,R,S,U,V } ############################################################################### Datum Tijd : 920809 18:12 Aan : KENWOOD TO ALL Onderwerp : TH-78A Guide V1.1 Hello OM, the following information about the TH-78A was collected by Joakim Karlsson N1JHW. 73 de Django DL5YEC ----------------------------------------------------------------------------- The Complete Guide to Undocumented Features of the TH-78A The information contained in this document is derived from many sources. Unfortunately, I have not kept track of everyone who has provided input, but I would like to thank those who have helped me compile this information. This document is probably not complete: Please send any additions or corrections to aviator@athena.mit.edu (Internet) or n1jhw@ka1srd.#ema.ma.usa.na (amateur radio packet) or ma0226@ma1bbs.mawg.ner (Civil Air Patrol packet). I've had one report that the TH-78A is capable of in-band full duplex operation. I've been unable to repeat this on my unit, which only has the CAP/MARS mod perform. Confirmation of this feature would be appreciated. Please Note: I can take no responsibility for any problems which may be caused by attempting to access one of the features described here. This document may be distributed in its original form only, and not via packet radio. 1. Hardware Mods Hardware modifications for the TH-78A are performed by manipulating a series of 6 surface mounted diodes, identified as D1 through D6. The TH-78A block diagram contains a table identifying 7 configurations involving D2, D3, D5, and D6. However, none of the configurations described below are included in that table. To open the radio, follow the instructions on p. 64 of the manual. The two TX/RX busy indicators (LEDs) have rubber seals placed over them. These have a tendency to fall off when opening or closing the radio. The diodes are located on the CPU board, which is mounted inside the front panel of the radio. The CPU board is readily identified by a brass shield covering the CPU, as well as the socket for the ME-1 memory expansion chip. All position references in this document assume that you are looking at the CPU board with the rotary encoders and TX/RX busy indicators at the top. If you have installed the ME-1 EEPROM, I recommend that you temporarily remove it to facilitate access to the diodes. The diodes are located in a vertical row just below the lower right corner of the brass shield. The diodes are numbered sequentially, starting with D1 at the top. The U.S. stock configuration has all diodes in place. The function of D1 is not known at this time. D2, D3, D5, and D6 are thought to control TX and RX ranges. D4 controls cross-band repeat. Before removing a diode, Kenwood recommends unsoldering the brass shield. There are four solder points, one at each corner. The brass shield is attached to the CPU with a small piece of double- sided adhesive tape. An alternate method consists of unsoldering the right side of the appropriate diodes, which are visible underneath the shield, and bending them to approximately a 45 degree angle, forming an open circuit. The two verified mods involving D5 and D6 are as follows: CAP/MARS mod: Remove D6 only. Yields RX 118-174 TX 142-152 RX 400-512 TX 425-455 Beyond MARS mod: Remove D5 only. Yields RX 50-180 TX 136-180 RX 300-400 [VHF side only] RX 400-512 TX 400-512 RX 800-950 [UHF side only] Note: The frequency ranges include the lower limit, but exclude the upper limit (i.e. 118-174 really means 118.000-173.995). Crossband repeat mod: Remove D4. Apparently, this mod is independent of the D5/D6 mods. 2. Undocumented Features Crossband Repeat: Press F for 1 second, then 0 [requires D4 mod] Repeat the same sequence to disable. Wideband RX: Press F for 1 second, then BAND [requires D5 mod] On the VHF side this yields 300-400 RX, on UHF 800-950 RX. Sample Channels: Press DUAL during power-up Programs some sample frequencies in VHF and UHF memory channels (it's a pain to undo the sample programming). Cloning: Press 0 during power-up [requires D5 or D6 mod] Allows cloning over the air. All keys except PTT and POWER are disabled. Press PTT to send DTMF cloning sequence. Presumably, receiving TH-78A must be in same mode. Toggle SHIFT/SPLIT Mode: Press SHIFT during power-up This is described in the manual, but the documentation is not complete. The TH-78A can operate in two modes: In SPLIT mode, non-standard offsets (i.e. split frequencies) are supported, but the default offset is not programmable. In SHIFT mode, non-standard offsets are not allowed, but the default offset is programmable. To select the default offset, press F for 1 second, then SHIFT. See p. 30 of the manual for details on changing the default offset. Toggle CALL Button Function: Press CALL during power-up. The CALL button can operate in one of two modes. In the default mode (CALLSW), it switches between the call channel and the last memory channel (if in memory recall mode) or last frequency (if in VFO mode). After toggling the CALL button functionality (VMC), it will switch from the VFO to the last memory channel and then back to the CALL channel. Game Mode: Press M and PTT during power-up [be careful not to accidentally reset the memory (M+POWER)] [Much of this was provided by james@brokaw.lcs.mit.edu] To exit the game mode at any time, press the LAMP key. It is not possible to change the volume, lamp, or frequency settings while in game mode. The top part of the display will show H.00, which represents the high score. The lower part shows a scrolling message, "PRESS ANY KEY". Pushing any key starts a "Follow Simon" type game. The display will briefly show one of the characters "1", "2", "3", or "F". Press the corresponding key. The game consists of repeating the displayed character sequence, which increases by one character each round. After you "win" the Simon memory game by getting correctly entering a sequence of twenty characters, the next game is a draw poker game. The way it works is that you choose your bet (from 1 to 10) by pressing 2 to increment the bet and 5 to decrement the bet. Then, press F to deal the five cards. The face value of the cards is displayed, and the suits can be seen at any time by holding down the PTT key. Any number of cards may be discarded, and to select (or deselect) a card for discarding, press the keys 1, 2, 3, 4, or 5. If a card is selected for discard, it is displayed "face-down". Press F again to draw new cards. Your new cards will be displayed, and then if your hand is 2-pair or better, the screen will show the rank of your hand on the left (2P for 2-pair, 4K for four-of-a-kind, etc.). On the right the pay- off for that hand will be displayed. Your bet is multiplied by the pay-off factor,and the resulting pile of cash is displayed in the right hand side of the upper screen. (The left hand side of the upper screen contains your table stakes, which are initially 100 coins from winning the Simon game.) If you win the poker hand, pressing any key steps into the next stage. If you lose the poker hand, your bet is deducted from your stakes and you are asked to start another poker hand. In the next stage, you are asked "TRYB/S" which means, "Do you want to try double-or-nothing in a guessing game for Big or Small cards?" Press F for yes, press TONE for no. If you say no, your winnings are credited into your stakes and you are asked to start another poker hand. If you say yes, then a single shuffling/incrementing card is displayed on the left, and three stars are displayed on the right. You have to choose to go for either BIG or SMALL, by pressing 2 or 5. You can keep pressing 2 and 5 to change your mind. When you are ready, you must try to hit the F key to stop the rotating card display, and the card will show, and you will either win, lose, or draw. If you draw, you have to play big/small again, I think. If you lose, your winnings are gone and you can play poker again. If you win, your winnings double and you are asked whether you want to play big/small again. The payoffs on the poker are set against you, odds-wise; the double-or-nothing game includes a draw, so the odds are against the player there unless you can time hitting the F key to win more than half the rounds. I haven't managed to do this, so I don't know if there is anything beyond this, all I know is that when the table stakes are exhausted, you go back to playing Simon again. [Version 1.1, 22 Juli 1992] ----------------------------------------------------------------------------- ----- Einde van bericht 11281 from KENWOOD TO ALL ----- PE1AGP de PI8VNW BBS > ############################################################################### Date: 18 Oct 92 13:16 Message-ID: <0@OE9XPI> From: DD8GR@OE9XPI To: KENWOO@EU Subject: TH-78E expansion Path: PI8EAE!PI8HWB!PI8HRL!PI8AIR!DK0MWX!DB0EAM!DB0DNI!DB0FP ... de DD8GR @ OE9XPI.AUT.EU to KENWOOD @ EU From: DD8GR @ OE9XPI.AUT.EU To: KENWOOD @ EU Date: 18.10.92 Hi out there! Thanks for reading this message! With regards to my previous message on the subject of frequency expan- sion of this HT some days ago, I'll resume what I've found: Following I'll describe the configuration I've found in my HT (factory): ======================================================================== Copper or alike shield ^ I ___ ------------------- I I <--- IC 2 | __________ | I I | I I | I___I __ | I IC 7 I | I I <--- ME 1 socket | I I =| D1 I__I | I__________I =| D2 | =| D3 |________________=| D4 = D5 = D6 In my case the diodes were configured as follows: ------------------------------------------------- D1 D2 D3 D4 D5 D6 closed not present open closed closed open the "open" diodes are present but one side (right side when looked at from the top as above) bent about 45ø upwards. As per the circuit diagram included with the HT the following is possible: Version E E2 D1 open open D3 close close D5 close close D6 close open The way my HT came from the dealer it can receive all the ranges, +/- 50 to 180 Mhz., 400 to 512 and the 300 & 900 Mhz. segments. According to this all that was then needed to do was to close (solder the right side down of D3, I've done this an the HT now has a TX range of 136-172 and 400-512, of course I've tried this with a dummy load. Nothing else has changed, the key layout has also remained, note that the "A" version has a different keyboard layout. This makes it very attractive if you should travel to coutries like the USA where the ranges are somewhat different, the offset at 70 cm. can be changed to +/- 5,0 Mhz. anyway (if you do not know how: press SHIFT at power on then F1 for longer than 1 sec. and SHIFT and you can change the off-set to whatever you want). Proceed at your own risk and remember to always transmit within your allocated frequency range, by the way, a modification like this voids the guarantee (I would suggest that thae manufacturers put DIP switches for things like this in the future...) P.S.: Thanks to Aad, PE1AGP for the submitted information! ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ» ³ ³ º ÛÛ²²±±°° 73's De Axel DD8GR @ OE9XPI.AUT.EU °°±±²²ÛÛ º ³ ³ º ÛÛ²²±±°° Immenstaad a. B., Germany, JN47QQ °°±±²²ÛÛ º ³ ³ ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ ³ ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ PE1AGP de PI8EAE-mbx: on #2 Users: 2 H=Help B=Bye D,?,I,J,K,L,R,S,U,V } ############################################################################### DIODE USE -------------------------------- D 1 = Select CHANNEL MODE D 2 = Select Country destin. D 3 = UHF limit range D 4 = Crossband RPT D 5 = Select County destin. D 6 = EXP. TX MOD EUROPE MATRIX (AIR BAND+300MHZ+900MHZ) = YES D1-D3-D4-D5 NO D2-D6 NOTE: THE DISPLAY SHOW 50 MHZ BUT "REALY" OPERATE FROM 91 MHZ AND UP ! LOW SENSIBILITY UHF & 900 MHz ----------------------------- For a good sensibility perform on the coil L51 and L52 on main board near the BNC socket. For a good sensibility on the extreme of band please repleace the L37 SMD COIL of 0.68 uH whit a 0.56 uH. -------------------------------------------------------------------------- ENABLE BAND 300MHz RX = in VHF push F for 1 sec. and push BAND ENABLE BAND 900MHz RX = in UHF push F for 1 sec. and push BAND NO DOCUMENTATE FUNCTION ======================= REPEATER CROSSBAND: Push key F for 1 second, and the key 0 (please remove the smd diode D4). EXPANSION RX: Push in VHF or UHF the key F for 1 sec, and BAND (remove smd diode D5) in VHF rx is 300-400 MHz in UHF 800-900 MHz. CONFIRM PAGER: Push MHZ and POWER ON the transceiver. You have the confirm whit the bell like the new Standard C-558 ! SHIFT PROGRAM.: Push SHIFT and POWER ON the transceiver. and the F for 1 second and the key SHIFT. You have on display 0.0 with step of 99.9 with step of 0.1. This function is ok for NO-Standard Shift, whitout delete the internal diode country destination matrix ! CLONING DATA: Push key 0 and POWER ON the transceiver (remove the smd diodes D5 D6).All the keys exept only the PTT and Power are not function. Push the PTT for start the cloning whit DTMF. CHANGE SHIFT/SPLIT: Push the SHIFT and POWER ON the transceiver. In Split Mode = you have offset non standard. In Shift Mode = not variable offset. CHANGE FUNZ.CALL: Push the key CALL and POWER ON the transceiver. The key CALL now have two functions: On default (CALLSW) = Function between channel memory and channel call and vfo. In other mode = function between vfo the last memory channel and return at call. GAMES: Push key M and PTT and ON the transceiver, you now have a 2 games, MEMORY GAME and CARD GAME (pocker). At the begin you are in Memory game and the access at the Pocker game is when in Memory game you have over 20 coin ! PLEASE PROTECT OUR LICENSES. DO NOT TRASMIT OUTSIDE OF LEGAL BANDS ! ******************************************************************* TH-78E EXPANSION Press "PTT" + "VFO" then "POWER ON". VHF band: 108-136MHz (AM) / 136-174MHz / 320-390MHz / 405-485MHz Note: In my case I found also 50-179.9875 MHz and 300-399.9875 MHz UHF band: 410-510MHz / 136-174MHz / 800-950MHz Note: In my case I found also 400-511 MHz By pressing "F" key for 1 sec. then press "BAND" key when in the "VFO" mode The VHF band switch from: >> "Amateur" >> "Air" >> "340MHz" and so on The UHF band switch from: >> "Amateur" >> "900MHz" and so on Note: Receiving mode of the 340MHz band can be switched from "FM" to "AM" by press and hold "VFO" key then "POWER ON" ------------------------------------------------------------------------------ TH-78E TX EXPANSION Remove the diode "D6" from the control unit. ------------------------------------------------------------------------------- TH-78E UHF band 432-438 MHz LIMITED RANGE Remove the diode "D3" from the control unit ------------------------------------------------------------------------------- CROSS BAND REPEATER Remove the diode "D4" from the control unit, then press "F" key for 1 sec. and press "0" key. ------------------------------------------------------------------------------- Good Luck ! Aad de PE1AGP @ PI8EAE ############################################################################### Date: 05 Apr 93 09:31 Message-ID: <0@DB0IZ> From: DL1YDD@DB0IZ To: GERAET@ALLE Subject: Modif. (2) TH78 1/2 Path: PI8EAE!PI8AWT!DB0NDR!DB0AHA!PI8AIR!DK0MWX!DB0IZ de DL1YDD @ DB0IZ.DEU.EU to GERAETE @ ALLE From : WB1E @ K1RQG.ME.USA.NA To : MODS @ ALLUS Date : 921007/0128 Msgid : BF 3616@K1RQG Subject : KENWOOD TH-78A MOD WARNING In the course of performing mods on my Kenwood TH-78A dual band handheld, I've discovered a potential flaw in the case design. While handling my walkie one day (after the mods were done), the display went blank and I could not turn the radio back on. With the radio split in half again, I could turn the radio back on but discovered all the memories were erased. The cause turned out to be some component pins on the front face coming in contact with the square bodies of the two volume/channel/squelch switches, when the case is screwed back together snuggly. I placed small strips of electrical tape on the sides of the switches to insulate, and reassebled; problem solved. Now I have to reprogram the darn thing.... Mark WB1E @ K1RQG.ME The Complete Guide to Undocumented Features of the TH-78A The information contained in this document is derived from many sources. Unfortunately, I have not kept track of everyone who has provided input, but I would like to thank those who have helped me compile this information. This document is probably not complete: Please send any additions or corrections to aviator@athena.mit.edu (Internet) or n1jhw@ka1srd.#ema.ma.usa.na (amateur radio packet) or ma0226@ma1bbs.mawg.ner (Civil Air Patrol packet). I've had one report that the TH-78A is capable of in-band full duplex operation. I've been unable to repeat this on my unit, which only has the CAP/MARS mod perform. Confirmation of this feature would be appreciated. Please Note: I can take no responsibility for any problems which may be caused by attempting to access one of the features described here. This document may be distributed in its original form only, and not via packet radio. 1. Hardware Mods Hardware modifications for the TH-78A are performed by manipulating a series of 6 surface mounted diodes, identified as D1 through D6. The TH-78A block diagram contains a table identifying 7 configurations involving D2, D3, D5, and D6. However, none of the configurations described below are included in that table. To open the radio, follow the instructions on p. 64 of the manual. The two TX/RX busy indicators (LEDs) have rubber seals placed over them. These have a tendency to fall off when opening or closing the radio. The diodes are located on the CPU board, which is mounted inside the front panel of the radio. The CPU board is readily identified by a brass shield covering the CPU, as well as the socket for the ME-1 memory expansion chip. All position references in this document assume that you are looking at the CPU board with the rotary encoders and TX/RX busy indicators at the top. If you have installed the ME-1 EEPROM, I recommend that you temporarily remove it to facilitate access to the diodes. The diodes are located in a vertical row just below the lower right corner of the brass shield. The diodes are numbered sequentially, starting with D1 at the top. The U.S. stock configuration has all diodes in place. The function of D1 is not known at this time. D2, D3, D5, and D6 are thought to control TX and RX ranges. D4 controls cross-band repeat. Before removing a diode, Kenwood recommends unsoldering the brass shield. There are four solder points, one at each corner. The brass shield is attached to the CPU with a small piece of double-sided adhesive tape. An alternate method consists of unsoldering the right side of the appropriate diodes, which are visible underneath the shield, and bending them to approximately a 45 degree angle, forming an open circuit. Early Model Radios Only ======================= CAP/MARS mod: Remove D6 only. Yields RX 118-174 TX 142-152 RX 400-512 TX 425-455 Beyond MARS mod: Remove D5 only. Yields RX 50-180 TX 136-180 RX 300-400 [VHF side only] RX 400-512 TX 400-512 RX 800-950 [UHF side only] Late Model Radios Only ====================== Beyond MARS mod: Remove D3. Also remove jumper W1. Yields RX 50-180 TX 136-180 RX 300-400 [VHF side only] RX 400-512 TX 400-512 RX 800-950 [UHF side only] Note: The frequency ranges include the lower limit, but exclude the upper limit (i.e. 118-174 really means 118.000-173.995). Crossband repeat mod: Remove D4. Apparently, this mod is independent of the D5/D6 mods. 2. Undocumented Features Crossband Repeat: Press F for 1 second, then 0 [requires D4 mod] Repeat the same sequence to disable. Wideband RX: Press F for 1 second, then BAND [requires D5 mod] On the VHF side this yields 300-400 RX, on UHF 800-950 RX. Sample Channels: Press DUAL during power-up Programs some sample frequencies in VHF and UHF memory channels (it's a pain to undo the sample programming). Cloning: Press 0 during power-up [requires D5 or D6 mod] Allows cloning over the air. All keys except PTT and POWER are disabled. Press PTT to send DTMF cloning sequence. Presumably, receiving TH-78A must be in same mode. Toggle SHIFT/SPLIT Mode: Press SHIFT during power-up This is described in the manual, but the documentation is not complete. The TH-78A can operate in two modes: In SPLIT mode, non-standard offsets (i.e. split frequencies) are supported, but the default offset is not programmable. In SHIFT mode, non-standard offsets are not allowed, but the default offset is programmable. To select the default offset, press F for 1 second, then SHIFT. See p. 30 of the manual for details on changing the default offset. Toggle CALL Button Function: Press CALL during power-up. The CALL button can operate in one of two modes. In th default mode (CALLSW), it switches between the call channel and the last memory channel (if in memory recall mode) or last frequency (if in VFO mode). After toggling the CALL button functionality (VMC), it will switch from the VFO to the last memory channel and then back to the CALL channel. ====================================================================== Game Mode: Press M and PTT during power-up [be careful not to accidentally reset the memory (M+POWER)] [Much of this was provided by james@brokaw.lcs.mit.edu] To exit the game mode at any time, press the LAMP key. It is not possible to change the volume, lamp, or frequency settings while in game mode. The top part of the display will show H.00, which represents the high score. The lower part shows a scrolling message, "PRESS ANY KEY". Pushing any key starts a "Follow Simon" type game. The display will briefly show one of the characters "1", "2", "3", or "F". Press the corresponding key. The game consists of repeating the displayed character sequence, whic h increases by one character each round. After you "win" the Simon memory game by getting correctly entering a sequence of twenty characters, the next game is a draw poker game. The way it works is that you choose your bet (from 1 to 10) by pressing 2 to increment the bet and 5 to decrement the bet. Then, press F to deal the five cards. The face value of the cards is displayed, and the suits can be seen at any time by holding down the PTT key. Any number of cards may be discarded, and to select (or deselect) a card for discarding, press the ke ys 1, 2, 3, 4, or 5. If a card is selected for discard, it is displayed "face-down". Press F again to draw new cards. Your new cards will be displayed, and then if your hand is 2-pair or better, the screen will show the rank of your hand on the left (2P for 2-pair, 4K for four-of-a-kind, etc.). On the right the pay- off for that hand will be displayed. Your bet is multiplied by the pay-off factor,and the resulting pile of cash is displayed in the right hand side of the upper screen. (The left hand side of the upper screen contains your table stakes, which are initially 100 coins from wi nning the Simon game.) If you win the poker hand, pressing any key steps into the next stage. If you lose the poker hand, your bet is deducted from your stakes and you are asked to start another poker hand. In the next stage, you are asked "TRYB/S" which means, "Do you want to try double-or-nothing in a guessing game for Big or Small cards?" Press F for yes, press TONE for no. If you say no, your winnings are credited into your stakes and you are asked to start another poker hand. If you say yes, then a single shuffling/incr ementing card is displayed on the left, and three stars are displayed on the right. You have to choose to go for either BIG or SMALL, by pressing 2 or 5. You can keep pressing 2 and 5 to change your mind. When you are ready, you must try to hit the F key to stop the rotating card display, and the card will show, and you will either win, lose, or draw. If you draw, you have to play big/small again, I think. If you lose, your winnings are gone and you can play poker again. If you win, your winnings doub le and you are asked whether you want to play big/small again. The payoffs on the poker are set against you, odds-wise; the double-or-nothing game includes a draw, so the odds are against the player there unless you can time hitting the F key to win more than half the rounds. I haven't managed to do this, so I don't know if there is anything beyond this, all I know is that when the table stakes are exhausted, you go back to playing Simon again. PE1AGP de PI8EAE-mbx: on #1 Users: 2 H=Help B=Bye D,?,I,J,K,L,R,S,U,V } ############################################################################### Date: 05 Apr 93 09:32 Message-ID: <0@DB0IZ> From: DL1YDD@DB0IZ To: GERAET@ALLE Subject: Modif. (2) TH78 2/2 Path: PI8EAE!PI8AWT!DB0NDR!DB0AHA!PI8AIR!DK0MWX!DB0IZ de DL1YDD @ DB0IZ.DEU.EU to GERAETE @ ALLE From: George_Lin@mindlink.bc.ca (George Lin) Newsgroups: rec.radio.amateur.misc Subject: Re: Kenwood TH-78 mods / Game Message-ID: <13077@mindlink.bc.ca> Date: 30 Jun 92 09:38:25 GMT Organization: MIND LINK! - British Columbia, Canada Distribution: world Lines: 125 To "open up" as many feature as possible on the TH78A, remove diodes D4 & D5 (located under the copper shield). This allows the following transmit and receive frequencies RECEIVE TRANSMIT --------------- --------------- VHF BAND -------- 50-135.995 (AM) (NA) 136-179.995 136-179.995 300-399 (AM & FM) (NA) SUB-UHF 400-511.99 400-511.99 UHF BAND -------- 400-511.99 400-511.99 900-949.9875 (NA) SUB-VHF 50-179.995 (FM) 136-179.995 PERSONAL NOTES: I found that marine weather reports at 162.40MHz in my area were received much better on the VHF-SUB band, than on the VHF band. Possible hole? If you are having problems with intermod, try switching BANDS (ie. USING the SUB-VHF rather than the VHF etc.) Cellular Phones are in the 870-890 range, but the frequency increments are every 30kHz. The TH78A will only increment in 25kHz steps at this frequency range, so the exact Cellular channel frequency cannot be tuned in (most of the time). Removing D4 enables the CROSS-BAND REPEATER function. CROSS-BAND REPEATER ------------------- Press [F] key for 1 second, then the [0] (zero) key to turn this function on and off (MHz dot will flash when in repeater mode). ANSWERBACK FUNCTION (during paging reception) --------------------------------------------- Hold down [MHz] key and switch power ON to turn this function ON or OFF. 300 MHz AM/FM SWITCHING ----------------------- Hold down [VFO] key and switch the power ON to switch between AM and FM reception. VHF & UHF EXPANSION ------------------- Press and hold the [F] key for 1 second, then press the [BAND] key in the respective bands. CHANNEL DISPLAY MODE -------------------- Hold down [3] key and switch the power ON. Channels are displayed by number instead of frequency. (NOTE: this function only works when Alpha-Numeric memory is enabled) CLONE FUNCTION -------------- Hold down the [0] and switch the power ON. *** GAME *** (Available without any modifications) -------------------------------------------------- Hold down the [M] and [PTT] keys and switch the power ON. (Be very careful the PTT is depressed or else a memory reset will occur.) 1) Play the memory game. The radio will beep and display one of the following characters: "1, 2, 3, F" (top row of buttons). Radio starts with one character and adds a new one on after every round until 20 characters are reached. You must press the keys in the same sequence they are displayed. When you can follow the radio for 20 characters, then you will win 100 coins and enter the poker game. (Note: I am terrible at this game, so I cheated by writing down the character sequence on paper.) 2) Poker game. (Much more interesting than the first game, IMHO) Place the bet (1 to 10). Increase the bet with the up key [2], decrease the bet with the down key [5]. Press [F] to deal the cards. Cards are (2,3,4,5,6,7,8,9,+,J,K,Q,A NOTE: 10 = "+") Press [PTT] to see the suits. Press numbers 1 through 5 to change the respective cards. Press [F] to deal the new cards. If you win any amount, you can bet for double or nothing. Press [F] to play "BIG or SMALL". Press [LOW] to keep your winnings. BIG or SMALL ------------ Arandom card will be chosen. Push [2] (big) if you think this card is going to be larger than 8. Push [5] (small) if you think this card is going to be less and 8. (if an 8 is drawn, then a tie occurs, and you neither win nor lose) Press [F] to draw the random card. You either double your winnings or lost it all. Press [F] to continue playing Big or Small. Press [LOW] to keep winnings and continue playing poker. Push the [LAMP] key to exit the game mode. Note: While in game mode, receive functions still operate! ---------------------------------------------------------- ----------------------------------- | George Lin | 145.270 MHz | | George_Lin@mindlink | VE7FKU | ----------------------------------- Newsgroups: rec.radio.amateur.misc From: rfc@allegra.att.com (Robert F. Casey) Subject: TH78A mod file, crossband repeat, extended RX/TX, cloning Message-ID: <1992Oct25.051148.8822@allegra.att.com> Organization: AT&T Bell Laboratories, Murray Hill, NJ Date: Sun, 25 Oct 1992 05:11:48 GMT Lines: 156 copied from packet: Msg# TSF Size #Rd Date Time Arrived Seq # Msg ID Route 2182 BF 7214 2 22-Oct 1938z 22-Oct (019609 - 029771WT3V ) [] N2CZF ==> MODS@ALLUSA "TH-78A Modification File" Date: 22 Oct 92 15:38:10 EDT (Thu) From: n2czf@wt3v.nj.usa (Rich Garcia) Message-ID: <029771WT3V> Reply-To: n2czf@wt3v.nj.usa To: mods@allusa Subject: TH-78A Modification File FILENAME:TH-78A.MOD June 25,1992 Revised: October 22, 1992 Modifications for the Kenwood TH-78A Dual Band Micro-HT. By Rich Garcia N2CZF. Packet Via N2CZF@WT3V.NJ.USA Owner assumes all responsibility for modifying or using these modifications!. The following mods will provide for Crossband Repeat and extended receive and transmit on the Kenwood TH-78A HT. I believe other functions are also enabled by these mods. which I have not found yet but I will update the file as news progresses. Diode #4- Crossband Repeat Diode #5- Extended Receive and out of band Transmit. Remove all screws and open radio as explained in the Kenwood manual for installing the memory expansion module. On the back cover you will find the memory expansion module socket and a copper shield to the upper left corner of it. Under this shield their will be a row of SMC diodes which are unmarked in a vertical configuration to the lower right portion covered by the shield. #1 Remove the shield at its four corners with a solder sucker and SMALL! iron. #2 Carefully count down from the 1st diode in the row to the fourth one and remove for crossband repeat. HINT: I found if you BRIEFLY touch the iron to the right side lead while gently pulling up on the SMC diode it should completely come off without needing to apply heat to the other side and further risk board damage. I used a pair of right angle surgical tweezers for this. #3 Just as above you may remove the fifth diode to preform the extended receive and transmit modification. #4 Reset the CPU (yes you will loose all of your programed memories! argh!) by pressing Function for more than one second and then "0". YOU HAVE NOW COMPLETED THE MODIFICATIONS! #5 For 800Mhz go to the UHF band with the band switch and press Function for more than one second quickly following with a press of the Band switch again. 8---.-- will appear. #6 For 300MHz go to the VHF band and repeat as above. Original bands are restored by repeating the "F Band" sequence. MY observations... All original functions have maintained the same which is great. Aircraft band which was accessible before the mod remains with the same characteristics. It seems that VHF-High band has improved a bit on sensivity where it was dead as a dog before the mod (above 155.000MHz) but the 162.000 MHz band where weather radio is is still a bit deaf for reception at any distance but about 20 Miles. This depends on your (or my) terrain and transmitter output power. On UHF all public safety frequencies up to about 500 MHz seem to come in well but sensivity greatly drops from there (we really can't ask for more). Frequencies can be programed in up to the 920MHz ham band but I have no way of measuring sensivity. 800MHz works but the signals are very weak, you must be near the transmitter for reception. Assuming you are in the town or city where the transmissions originate it should work. Transmit is enabled up to and incl. 500MHz but after testing this on a frequency counter I find that a signal is only generated to about 490 MHz, even though the trans. LED shows output in the higher frequencies. Crossband repeat seems to work fine but the audio is unacceptable for use, BE AWARE the radio gets HOT! Prolonged use or use on a busy frequency would not be recommended. Also remember this is a dual band HT please use a proper antenna while in this mode to avoid a high SWR, we should all know better... Right? After first booting up the CPU in the mod I found that the message screen showed "Cloning" so it seems that this radio now has cloning capabilities. After searching I have found that holding the "0" key and powering up the radio will display the clone feature, see below for further explination.This leads me to believe that this HT may have some more "Hidden" features that I am trying to find, some may be useful. Thanks to Gary KC8UD who sent me the following via packet ..... CLONING: The TH-78 can be cloned without cloning cables or special equipment. It is done entirely with RF, and, in fact, can be transmitted over the air, and even via repeaters. This may be extremely useful for those users who do not have the patience to program their own radios themselves. This application would also be useful for clubs and user groups. (However, this can take as long as 50 minutes with the ME-1 expansion module. It is recommended that a dummy load be used to prevent unwanted QRM.) (1) Both radios must be on the same frequency. (2) Activate both radios by pressing the "0" key while turning the power on. The radios will display CLONE. (3) Now, click the PTT of the "master" radio. The radio will transmit in the conomy low power mode. This may take about 4 minutes for fifty channels. hen the data has been transferred, both radios will revert back to the riginal frequency. (4) Turn both radios off and then on again. They will now operate normaly while the slave radio has the same memory contents as the master radio. ** I have not tried the following modification myself, try at your own risk ** *** Rich N2CZF *** FREQUENCY EXPANSION (1) You can receive from 340 - 399.987 Mhz FM by removing chip diode D8 on the ontrol unit. To access this function, press the [F] key for one second, and then the [LOW] key. This toggles between AMATEUR, AIR band (AM) and 360 Mhz. AM and FM modes are selected automatically, depending on frequency. ** Since "F" for a second and "Low" toggles the power output, I wonder ** *** Rich N2CZF *** There is also a couple of arcade type games on the TH-78A. To start the game you pres and hold [PTT] and [M] keys while turning the unit on. The first game is a follow me type game. The radio beeps and shows a sequence of numbers flashing on the screen. You have to match the same sequence on the tone pad. Each time the sequence gets longer by one number. You have to keep remembering the sequence as one gets added each time. Once you get to a certain high score on that game, it breaks into a poker type game. To exit the game mode press the LAMP key at any time. The receiver still works in the game mode and you can adjust volume but no other features. RG> The games seem to work fine and it is interesting that they have inserted that into the programing of the chips. Does anyone know of any further features in the radio be it games or radio functions. 73's Rich N2CZF Bricktown, NJ ============================================================================= Note: I haven't tried or verified this, proceed at your own risk. And do not transmit outside of legal bands! WA2ISE PE1AGP de PI8EAE-mbx: on #1 Users: 2 H=Help B=Bye D,?,I,J,K,L,R,S,U,V } ############################################################################### Type Stat : B$ Datum Tijd : 930405 02:42 Aan : KENWOO @ALLE Afzender : DL3XU Onderwerp : 10m mit TH 78 BID nummer : 0343035DB0HB Path: !PI8MID!ON1CED!ON4AWP!ON6AR!ON1AEO!ON4UBO!DB0IZ!DB0GE!DK0MTV!DB0GV! !DB0EAM!DK0MAV!DB0CEL!DB0CL!DB0HBS!DB0AGM!DB0HB! de dl3xu @ db0hb to kenwood @ alle Mit dem TH 78 auf dem 10m - Relais DF0HHH ! =============================================== Material : TH 78, TM 741, 2x TSU-7 I ) TH 78 vorbereiten : 1.) Zuerst die TSU-7 - Platine einbauen: Geraet oeffnen, Kabel J 301 von beiden Loetpunkten abschneiden, TSU-7 einsetzen (siehe englisches Handbuch), Geraet wieder zusammenbauen. 2.) Band und QRG waehlen erst F, dann TONE druecken ( F NICHT > 1 sec.! ), mit Hauptabstimmknopf gewuenschten CTCSS-Ton einstellen, mit VFO zurueck in VFO-Betrieb 3.) CTCSS aktivieren mit F, dann CTCSS, im Display erscheint CT, desaktivieren: genauso II ) TSU-7 in TM 741 einbauen ---------------------------- 1.) Bedienteil abnehmen, in leeren kleinen Sockel links hinter Bedien- teil TSU-7 einsetzen ( siehe auch englisches Handbuch ) 2.) Bodenplatte abnehmen auf der vorderen kleinen Platine befinden sich drei blaue 0-Ohm- Bruecken: R 58 halb links oben, R 56 Mitte halb rechts und R 60 unten rechts. R 58 ausloeten ( fuer Repeaterbetrieb ) Geraet zusammenbauen 3.) Gewuenschte CTCSS-Toene fuer Sende- und Empfangsband einstellen ( F > 1 sec., dann TONE, Toene einstellen, dann VFO ) ( DF0HHH arbeitet z.Zt. mit 67 Hz ) 4.) CTCSS aktivieren : 2 x TONE druecken III ) Repeater - Modus fuer TM 741 : ------------------------------- 1.) gewuenschte Frequenzen und CTCSS auf beiden Baendern einstellen 2.) TX - Band mit Band-Select (PTT) bestimmen RX - Band mit Control-Select ( Leuchtdiode gruen schalten ) bestimmen 3.) F > 1 sec, dann MUTE druecken ( Display zeigt Punkte zwischen den Zahlen ) 4.) Jetzt kann ich auf der Eingabefrequenz (z.B: 70 cm ) mit dem TH 78 senden, der TM 741 setzt meine Sendung um auf 10 m, und ich hoere die Antwort vom 10m-Relais im 70cm- Handfunkgeraet ! Allerdings gibt es durch die Umsetzung und die Auswertung der CTCSS-Toene eine leichte Verzoegerung von 1-2 sec. zwischen Sende- und Empfangsum- schaltung auf der gesamten Strecke. Da ich auf meiner eigenen Link-Strecke ( z.B.: auf 70 cm ) die CTCSS-Toebe frei waehlen kann, ist der Einstieg geschuetzt. Uebrigens: Beschreibung fuer Einbau der TSU-7 und Betrieb mit CTCSS ist nur in den englischen Hanbuechern erwaehnt ! 73 es 55 beim " linken " de Winni , DL3XU @ DB0HB ----- Einde van bericht 45945 aan KENWOO @ ALLE ----- PE1AGP de PI8VNW BBS > r 42277 Date: 10 Jun 93 15:42 Message-ID: <0@ON4UBO> From: ON9CSK@ON4UBO To: KENWOO@WW Subject: TH78A -> TH78E + MODS Path: PI8EAE!PA3EAE!PI8UTR!PI8ZAA!PI8AIR!ON4UBO de ON9CSK @ ON4UBO.LG.BEL.EU to KENWOOD @ WW TH-78A (U.S.A. version) --> TH78E (European version) MODS. ********************************************************** Hello TH78 user, If you bought a TH78A in the USA you don't have the 1750 Hz repeater tone access, but you can change that ! Apart from the well-known six diodes, the new CPU has 2 green wires. In order to use the TH78A in EU, you must do the following: - First you have to remove D2 for the standard EU bands. - Now control that the 2 green wires and the 5 other diodes are installed (D1, D3, D4, D5 and D6). - If you need band expantion and components location, please see the mods below. Although the TH78A has a special bandpass filter for the US 70cm band, I could not notice a decrease in sensitivity in the EU part of the 70 cm band. There is a function change for 3 knobs; please see below and also p. 6 and 7 of your INSTRUCTION MANUAL. TH-78A --> TH-78E --------------------------- LAMP --> TONE 1750 Hz CALL --> LAMP TONE --> CALL Now, you can choice between the CTCSS tones and the 1750 Hz with the following sequence: F + LAMP (the new TONE !) and then the right rotary encoder to make yur frequency choice. ******************************************************************************* KENWOOD TH-78E MODS ******************* Hello TH-78E user, I recently bought a TH-78E which apparently had a new CPU. You can see this internally. Apart from the well-known six diodes it also has two green wires, indicated on the PCB as W1 and W2. WARNING !!! ----------- In the course of performing mods on my Kenwood TH-78E dual band handheld, I've discovered a potential flaw in the case design. While handling my walkie one day (after the mods were done), the display went blank and I could not turn the radio back on. With the radio split in half again, I could turn the radio back on but discovered all the memories were erased. The cause turned out to be some component pins on the front face coming in contact with the square bodies of the two volume/channel/squelch switches, when the case is screwed back together snuggly. I placed small strips of electrical tape on the sides of the switches to insulate, and reassebled; problem solved. Now I have to reprogram the darn thing.... ############################################################################### The Guide to Undocumented Features of he TH-78E ------------------------------------------------ The information contained in this document is derived from many sources. This document is probably not complete. 1. Hardware Mods ---------------- Hardware modifications for the TH-78E are performed by manipulating 2 green wires and a series of 6 surface mounted diodes, identified as D1 through D6. The TH-78E block diagram contains a table identifying configurations involving D2, D3, D5, and D6. However, none of the configurations described below are included in that table. To open the radio, follow the instructions on p. 64 of the manual. The two TX/RX busy indcators (LEDs) have rubber seals placed over them. These have a tendency to fall off when opening or closing the radio. The diodes and wires are located on the CPU board, which is mounted inside the front panel of the radio. The CPU board is readily identified by a brass shield covering the CPU, as well as the socket for the ME-1 memory expansion chip. All position references in this document assume that you are looking at the CPU board with the rotary encoders and TX/RX busy indicators at the top. If you have installed the ME-1 EEPROM, I recommend that you temporarily remove it to facilitate access to the diodes. The diodes are located in a vertical row just below the lower right corner of the brass shield. The diodes are numbered sequentially, starting with D1 at the top. The E3 configuration has diodes D1, D3, D4, D5 and D6 and the 2 green wires in place. Remove jumper W1 (one of the two green wires). RX is: 50-136 AM, 136-180 FM, 300-400 AM/FM, 400-512 FM (VHF SIDE). 50-180 FM, 400-512 FM, 800-1000 FM (UHF SIDE). TX is: 136-180 FM and 400-512 FM Crossband repeat mod: Remove D4. 2. Software Mod --------------- If you don't need the TX MOD, try the following: Push PTT + VFO and POWER ON. TX is not affected, RX is like above. 3. Undocumented Features ------------------------ Crossband Repeater: Press F for 1 second, then 0 (requires D4 mod). Repeat the same sequence to disable. Cloning: Press 0 during power-up. Allows cloning over the air. All keys except PTT and POWER are disabled. Press PTT to send DTMF cloning sequence. Presumably, receiving TH-78E must be in same mode. Toggle SHIFT/SPLIT Mode: Press SHIFT during power-up. This is described in the manual, but the documentation is not complete. The TH-78E can operate in two modes: In SPLIT mode, non-standard offsets (i.e. split frequencies) are supported, but the default offset is not programmable. In SHIFT mode, non-standard offsets are not allowed, but the default offset is programmable. To select the default offset, press F for 1 second, then SHIFT. See p. 30 of the manual for details on changing the default offset. Toggle CALL Button Function: Press CALL during power-up. The CALL button can operate in one of two modes. In the default mode (CALLSW), it switches between the call channel and the last memory channel (if in memory recall mode) or last requency (if in VFO mode). After toggling the CALL button functionality (VMC), it will switch from the VFO to the last memory channel and then back to the CALL chanel. 300 MHZ AM/FM switching: Hold down VFO key and switch the POWER ON to switch between AM and FM reception. VHF & UHF expansion: Press the F key for 1 second, then press the BAND key. On VHF you have now 300-400 AM/FM RX and on UHF 800-1000 FM RX. Channel display mode: Hold down 3 key and switch the POWER ON. Channels are displayed by number instead of frequency. (NOTE: this function only works when Alpha-Numeric memory is enabled). 4. Considerations ----------------- For some frequencies, the TH-78 will "beep": this is PLL unlock and there is no RX/TX ! For high frequencies, the red TX led will not glow: no TX ! The locking ranges are different on MAIN BAND and SUB BAND. When monitoring 2 VHF freq., the sensitivity of the MAIN VHF BAND is attenuated but VHF SUB BAND is still good. Thus monitor strong VHF signals on VHF MAIN BAND and weak VHF signals on VHF SUB BAND. VHF SUB BAND work only in FM and not in AM. When monitoring (VHF or UHF) out f ham band signals, sensitivity is realy better in SUB BAND. Also the rubber duck antenna has only a good efficiency in the ham frequencies, that's why my preference go to the 37 cm long COMET CH-600MX antenna. Sensitivity in the 959 MHz portable telephone band is low, but good enough to listen the neighbours cordless telephones. When charging PB13 battery, you need 15.5 V on the DC IN TERMINAL to have a charge current of 70 mA (1/10 of C) for 15 H. ******************************************************************************* *** GAME *** (Available without any modifications) -------------------------------------------------- Hold down the M and PTT keys and switch the power ON. (Be very careful the PTT is depressed or else a memory reset will occur.) 1) Play the memory game. The radio will beep and display one of the following characters: "1, 2, 3, F" (top row of buttons). Radio starts with one character and adds a new one on after every round until 20 characters are reached. You must press the keys in the same sequence they are displyed. When you can follow the radio for 20 characters, then you will win 100 coins and enter the poker game. (Note: I am terrible at this game, so I cheated by writing down the character sequence on paper.) 2) Poker game. (Much more interesting than the first game, IMHO) Place the bet (1 to 10). Increase the bet with the up key 2, decrease the bet with the down key 5. Press F to deal the cards. Cards are (2,3,4,5,6,7,8,9,+,J,K,Q,A NOTE: 10 = "+") Press PTT to see the suits. Press numbers 1 through 5 to change the respective cards. Press F to deal the new cards. If you win any amount, you can bet for double or nothing. Press F to play "BIG or SMALL". Press LOW to keep your winnings. BIG or SMALL ------------ Arandom card will be chosen. Push 2 (big) if you think this card is going to be larger than 8. Push 5 (small) if you think this card is going to be less and 8. (if an 8 is drawn, then a tie occurs, and you neither win nor lose) Press F to draw the random card. You either double your winnings or lost it all. Press F to continue playing Big or Small. Press LOW to keep winnings and continue playing poker. Push the LAMP key to exit the game mode. Note: While in game mode, receive functions still operate! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Game Mode: Press M and PTT during power-up (be careful not to accidentally reset the memory (M+POWER)). To exit the game mode at any time, press the LAMP key. It is not possible to change the volume, lamp, or frequency settings while in game mode. The top part of the display will show H.00, which represents the high score. The lower part shows a scrolling message, "PRESS ANY KEY". Pushing any key starts a "Follow Simon" type game. The display will briefly show one of the characters "1", "2", "3", or "F". Press the corresponding key. The game consists of repeating the displayed character sequence, which increases by one character each round. After you "win" the Simon memory game by getting correctly entering a sequence of twenty characters, the next game is a draw poker game. The way it works is that you choose your bet (from 1 to 10) by pressing 2 to increment the bet and 5 to decrement the bet. Then, pressF to deal the five cards. The face value of the cards is displayed, and the suits can be seen at any time by holding down the PTT key. Any number of cards may be discarded, and to select (or deselect) a card for discarding, press the ke ys 1, 2, 3, 4, or 5. If a card is selected for discard, it is displayed "face-down". Press F again to draw new cards. Your new cards will be displayed, and then if your hand is 2-pair or better, the screen will show the rank of your hand on the left (2P for 2-pair, 4K for four-of-a-kind, etc.). On the right the pay- off for that hand will be displayed. Your bet is multiplied by the pay-off factor,and the resulting pile of cash is displayed in the right hand side of the upper screen. (The left hand side of the upper screen contains your table stakes, which are initially 100 coins from wi nning the Simon game.) If you win the poker hand, pressing any key steps into the next stage. If you lose the poker hand, your bet is deducted from your stakes and you are asked to start another poker hand. In the next stage, you are asked "TRYB/S" which means, "Do you want to try double-or-nothing in a guessing game for Big or Small cards?" Press F for yes, press TONE for no. If you say no, your winnings are credited into your stakes and you are asked to start another poker hand. If you say yes, then a single shuffling/incr ementing card is displayed on the left, and three stars are displayed on the right. You have to choose to go for either BIG or SMALL, by pressing 2 or 5. You can keep pressing 2 and 5 to change your mind. When you are ready, you must try to hit the F key to stop the rotating card display, and the card will show, and you will either win, lose, or draw. If you draw, you have to play big/small again, I think. If you lose, your winnings are gone and you can play poker again. If you win, your winnings double and you are asked whether you want to play big/small again. The pyoffs on the poker are set against you, odds-wise; the double-or-nothing game includes a draw, so the odds are against the player there unless you can time hitting the F key to win more than half the rounds. I haven't managed to do this, so I don't know if there is anything beyond this, all I know is that when the table stakes are exhausted, you go back to playing Simon again. ******************************************************************************* 73' and try it at your own risk ! I haven't tried the games. Karl, ON9CSK @ ON1BWP.#BTN.BEL.EU PE1AGP de PI8EAE-mbx: on #2 Users: 1 H=Help B=Bye D,?,I,J,K,L,R,S,U,V } ############################################################################### r 5102 Date: 25 Jan 93 04:41 Message-ID: <3607@KC4CLD> From: KC4CLD@KC4CLD To: MODS@WW Subject: RADIO MODIFICATIONS Path: PI8EAE!PA3EAE!PI8UTR!PI8AIR!PI8VNW!PI8MID!ON1CED!GB7TLH ... I found this file with many modifications for old radios. I hope this can help someone with modifications and....enjoy it!! 73s de Lionel, KC4CLD in Miami ICOM H-16/U-16 Cut standup diode on upper forward circuit board. Remove jumper on left side forward circuit board. (Enables front panel programming) 28H/DH Cut D21 (Frees Band fm 134 to 174) 735 Remove cover/heat sink. Cut D33/D34. (Frees band) 2AT Cut brown jumper wire on back of thumbwheel. Solder "C4" connection of the other end of the flexible board. This mod allows coverage of 141-149mhz. 720A Cut D-44 on back of front panel (Frees band xmit) 255A While pressing ""Tone", switch function to N. Release "Tone", switch function back to R. 740 Locate J1 on RF unit. Cut white resistor on right of J1. 751 Cut green wire on J3 Pin1 on logic unit. Cut black wire on J3 (mute). 745 Cut brown wire on J3 (mute). 02AT On back of front panel remove D2, add D4. H-6 Matrix programmed BCD. (Desired freq) - (Local osc freq)/.005 - 1000 = BCD A2 Accessing duplex function 1. Determine receive (RX) and transmit (TX) frequencies and RX frequency from TX frequency to determine offset. 2. Enter RX frequency into radio by depressing 1400 on keypad. 3. Depress and hold function key on side of radio while pushing "7" key. 00.00 will appear on LCD. 4. While continuing to hold function key down, depress "#" key. A "+" will appear in upper left hand corner of LCD. 5. Enter offset via key pad while still depressing function key. 6. Release function key. Display will read receive freq and "+" will still appear in upper left corner. When in this function, transceiver will automatically transmit on offset freq. Duplex channels may be stored in memory channels 7,8,9, and 0. To exit duplex function, simply enter next operating freq in the normal manner. ############################################################################### KENWOOD TH-205AT Cut JP2. (Near speaker) TS-930 Add jumpers: IC21 PIN 12 - IC11 PIN 9 IC22 PIN 12 - IC12 PIN 9 IC23 PIN 12 - IC24 PIN 8 TS-430S Unplug 3 wire plug from socket (10) TM-2530/50/70 Locate control unit on bottom of radio. At left of IC3 cut diodes D8 & D11. Reset microprocessor. TR-2600 On RX unit cut D32 & D33. Reset microprocessor. TS-440 Cut diode D-80 on control unit board. TH-215A Cut J1 & J2 on back of front board. YAESU FT-23R On backside of front panel (control unit) remove solder from "7". FT-ONE On the control unit (front left) locate two jumpers by Q5022/RB5003, cut jumper going from "F" to "D" FT-73 On CPU remove solder on pin 8. PE1AGP de PI8EAE-mbx: on #1 Users: 2 H=Help B=Bye D,?,I,J,K,L,R,S,U,V } ****************************************************************************** Date: 07 Nov 92 14:25 Message-ID: <0@ON4UBO> From: PE1ACG@ON4UBO To: TH78@EU Subject: th78 secret function manual 1/6 Path: PI8EAE!PA0SCH!IK7GFP!IK2DFZ!IW2DNI!IW2GKO!I5SGG!4X1RU ... de PE1ACG @ ON4UBO SECRET FUNCTION MANUAL OF THE KENWOOD TH-78x PORTO TH-78E RX EXPANSION (ON) Press PTT + VFO, then POWER ON. New RX ranges after this modification: VHF Band 50 - 136 Mhz (only AM) 136 - 174 Mhz (only FM) 320 - 390 Mhz (AM + FM) see note below. UHF Band 405 - 510 Mhz (only FM) 800 - 950 Mhz (only FM) VHF Band: _________ _____ _________ ---->I AMATEUR I====I AIR I--->I 320 Mhz I_____ I I_________I I_____I I_________I I I______________________________________________I UHF Band: _________ _________ --->I AMATEUR I--->I 900 Mhz I_____ I I_________I I_________I I I___________________________________I Note: Receiving mode of the 340 Mhz Band can be switched from FM to AM by press and hold VFO key then POWER ON. TH-78E RX EXPANSION (OFF) _____ Reset your TH-78E by pressing the I M I key, when powering ON I_____I TH-78E TX EXPANSION Remove the diode D6 from the control unit. New TX ranges after this modification: VHF Band 136.000 - 174.250 Mhz (FM) UHF Band 400.000 - 493.000 Mhz (FM) TH-78E UHF BAND 432-438 Mhz LIMITED RANGE Remove the diode D3 from the control unit. TH-78A/E EXTENDED FUNCTION You can change the frequency range and use various secret function of the TH-78A/E by changing his destination. A secret funcion is available without modification. Destination modification The destination is determined by diodes D2,D3,D5, and D6. Change the destination with reference to table 2. For information about setting the destination by diode, see the destination column of table 2. The diodes are protected by a shield plate. Remove the shield plate, then remove the appropriate diodes. Refere to your schematic diagram TH-78A/E 2/2 Control Unit Board X53-342X-XX A/5 __________________ Cupper shield plate : :/ Table 2 : ___________ : ____________________________ : I I : I I I I I I : I CPU I : I DestinationID2 ID3 ID5 ID6 I : I IC 7 I : I------------I---I---I---I---I : I I : I 0-00 (J) INo INo INo IYesI : I___________I : I------------I---I---I---I---I : _:_ I 0-11 (K) IYesIYesIYesIYesI : I_:_I D1 I------------I---I---I---I---I : I_:_I D2 I 0-21 (M) IYesINo IYesIYesI : I_:_I D3 I------------I---I---I---I---I : I_:_I D4 I 0-22 (M2) IYesINo IYesINo I : I_:_I D5 I------------I---I---I---I---I :________________I_:_I D6 I 0-71 (X) INo IYesINo INo I I------------I---I---I---I---I Control unit I 2-71 (E) INo IYesIYesIYesI I------------I---I---I---I---I I 2-72 (E2) INo IYesIYesINo I I____________I___I___I___I___I Secret functions after modification The following functions are added if you modify the destination. See the appropriate description for details. Frequency range change Change the diodes (D2,D5,D3, and D6) as shown in the destination column of Table 2 . Cross-band repeater _____ _____ Remove D4 and press the I F I key for one second, then the I 0 I key, to turn this I_____I function ON or OFF. I_____I Answerback function (during paging reception) _____ Hold down the I Mhz I key and switch the POWER ON to turn this function I_____I ON or OFF. 300-Mhz band AM/FM switching _____ Hold down the I VFO I key and switch the POWER ON to switch between AM and FM. I_____I VHF expansion band _____ ______ Press the I F I key for one second, then the I BAND I key,to change the band. I_____I I______I UHF expansion band _____ ______ Press the I F I key for one second, then the I BAND I key,to change the band. I_____I I______I Channel display mode _____ Hold down the I 3 I key and switch the POWER ON to change te frequency I_____I display to the memory channel. # If you remove D1, only the channel is displayed. Normally, leave D1 # in. Clone function _____ Hold down the I 0 I key and switch the POWER ON to use this function. I_____I Secret function available without modification.(Game function) _____ _____ Hold down the I M I and I PTT I key and switch the POWER ON to use this function.I_____I I_____I Cross-band repeater When one band becomes busy, the cross-band repeater function retrans- mitts the received signal on the other band. As soon as the BUSY signal for the receiver band goes low, the transceiver enter receive mode on both bands. Note 1: DTTS and paging are not checked. Note 2: If TONE of the transmitter is on, a subtone is output. Note 3: If the transmitter does not output a subtone, CTCSS is checked. Cross-band repeater ON/OFF You can turn the cross-band repeater ON and OFF by pressing the _____ _____ I F I key for one second, then the I 0 I key. I_____I I_____I The dot indicating Mhz on the frequency display (both bands) flashes while the cross-band repeater function is on. Note 1: The cross-band repeater does not turn on during dual watch. Note 2: If you enable the cross-band repeater when the bell function is on, the bell function is turned off and the cross-band repeater function is turned on. You can turn the repeater on only if the bell function for the operation band is off. Note 3: A dedicated jumper is used to select whether to use the cross-band repeater. Note 4: The timeout timer is set to three minutes. Cross-band repeater operation Operation band BUSY band:change band:change _____________________:______________________:______ : : ______ _ :_____________ :_ Non)operation band I I I I I I I I BUSY __I I__I I______I I________I I____ ______ ___ _____________ ___ Operation band I I I I I I I I transmission __I I__I I____I I________I I__ ->I---I<- ->I---I<- 500 ms 500 ms Answerback function If the transmitter pages a receiver, it does not know whether the receiver has received the paging signal. When the answerback function is ON, the receiver returns a code automatically if the paging code matches to indicate that it has received the paging signal. The transmitter can thus confirm that the code it sent was actually received. Operation If the paging code matches and the busy signal goes low, the receiver returns a code. If the paging code does not match, the receiver does not return a code. The answerback function is related to the bell function: if you turn the bell function on when the answerback function is on, the answerback function works; If you turn the bell function off, the answerback function does not work. If the answer- back function is off, only the bell function can be turned on or off. To turn the answerback function on and off, hold down the _____ key and switch the POWER ON. I Mhz I I_____I Note : This function is available only if reception is modified. __________ ______________________ BUSY I I I____________________________________I Receive : _ _ _ _ _ _ _ : code : I I I I I I I I I I I I I I : __________:___I I_I I_I I_I I_I I_I I_I I______:______________________ : : : : : : Paging code : : : :<----------------------->: : ->:---:<-250ms(450/750ms for shift, split channel) : : .....................................: : __________: ___________________ TX ON I I I_______________________________________I : _ _ _ _ _ _ _ : I I I I I I I I I I I I I I __________:___I I_I I_I I_I I_I I_I I_I I_____________________________ Transmit : : : code : : Paging code : : :<----------------------->: ->:---:<-250ms(450/750ms for shift, split channel) ______________ _____________________________ Microphone OFFI I I_________________________I VHF expansion band You can change the reception of AMATEUR band, AIR band, and POLICE band by pressing the _____ key for one second, then the ______ I F I I BAND I I_____I I______I key, when the VHF band is VFO. _______________________________________________ I I Police band I I===================I===========================I I Step I 10, 20, 12.5, 25 Khz I I-------------------I---------------------------I I Frequency range I 300.000 -- 399.995 Mhz I I-------------------I---------------------------I I Initial frequency I 340.000 Mhz I I___________________I___________________________I UHF expansion band You can change the reception of AMATEUR band and CAR TELEPHONE band by pressing the _____ key for one second, then the ______ key, I F I I BAND I I_____I I______I when the UHF band is VFO. _______________________________________________ I I Car telephone I I===================I===========================I I Step I 12.5, 25 Khz I I-------------------I---------------------------I I Frequency range I 800.000 - 949.987.5 Mhz I I-------------------I---------------------------I I Initial frequency I 800.000 Mhz I I___________________I___________________________I Note 1:Program scan cannot be performed over bands. It can only be performed within each band. Note 2:You cannot change the band in MR and CALL modes. Note 3:The AIR band frequency range is shown below. It is contiguous in the VHF amateur band frequency range. Note 4:The initial step is the same as the VHF amateur band step. Note 5:If the AIR band is received as the UHF subband, FM reception is performed. Note 6:The step is the same as the VHF band step. _________________________________________________ I I Air I I===================I=============================I I Step I 5, 10, 15, 20, 12.5, 25 Khz I I-------------------I-----------------------------I I Frequency range I 50.000 - 135.995 Mhz I I___________________I_____________________________I Channel display mode Select the channel mode by cutting D1 on the CONTROL UNIT. If you cut D1 on the CONTROL UNIT, you can use channel display mode only. You cannot change it to normal display mode from the panel. If you do not cut D1 on the CONTROL UNIT, you can change between channel display mode and normal display mode by holding the _____ key and switch the POWER ON. I 3 I I_____I Note :Memory channels for both bands must contain frequencies. If nothing is stored in memory, an error occurs. 73's Wim PE1ACG PE1AGP de PI8EAE-mbx: on #1 Users: 2 H=Help B=Bye D,?,I,J,K,L,R,S,U,V } Datum Tijd : 920809 18:12 Aan : KENWOOD TO ALL Onderwerp : TH-78A Guide V1.1 Hello OM, the following information about the TH-78A was collected by Joakim Karlsson N1JHW. 73 de Django DL5YEC ----------------------------------------------------------------------------- The Complete Guide to Undocumented Features of the TH-78A The information contained in this document is derived from many sources. Unfortunately, I have not kept track of everyone who has provided input, but I would like to thank those who have helped me compile this information. This document is probably not complete: Please send any additions or corrections to aviator@athena.mit.edu (Internet) or n1jhw@ka1srd.#ema.ma.usa.na (amateur radio packet) or ma0226@ma1bbs.mawg.ner (Civil Air Patrol packet). I've had one report that the TH-78A is capable of in-band full duplex operation. I've been unable to repeat this on my unit, which only has the CAP/MARS mod perform. Confirmation of this feature would be appreciated. Please Note: I can take no responsibility for any problems which may be caused by attempting to access one of the features described here. This document may be distributed in its original form only, and not via packet radio. 1. Hardware Mods Hardware modifications for the TH-78A are performed by manipulating a series of 6 surface mounted diodes, identified as D1 through D6. The TH-78A block diagram contains a table identifying 7 configurations involving D2, D3, D5, and D6. However, none of the configurations described below are included in that table. To open the radio, follow the instructions on p. 64 of the manual. The two TX/RX busy indicators (LEDs) have rubber seals placed over them. These have a tendency to fall off when opening or closing the radio. The diodes are located on the CPU board, which is mounted inside the front panel of the radio. The CPU board is readily identified by a brass shield covering the CPU, as well as the socket for the ME-1 memory expansion chip. All position references in this document assume that you are looking at the CPU board with the rotary encoders and TX/RX busy indicators at the top. If you have installed the ME-1 EEPROM, I recommend that you temporarily remove it to facilitate access to the diodes. The diodes are located in a vertical row just below the lower right corner of the brass shield. The diodes are numbered sequentially, starting with D1 at the top. The U.S. stock configuration has all diodes in place. The function of D1 is not known at this time. D2, D3, D5, and D6 are thought to control TX and RX ranges. D4 controls cross-band repeat. Before removing a diode, Kenwood recommends unsoldering the brass shield. There are four solder points, one at each corner. The brass shield is attached to the CPU with a small piece of double- sided adhesive tape. An alternate method consists of unsoldering the right side of the appropriate diodes, which are visible underneath the shield, and bending them to approximately a 45 degree angle, forming an open circuit. The two verified mods involving D5 and D6 are as follows: CAP/MARS mod: Remove D6 only. Yields RX 118-174 TX 142-152 RX 400-512 TX 425-455 Beyond MARS mod: Remove D5 only. Yields RX 50-180 TX 136-180 RX 300-400 [VHF side only] RX 400-512 TX 400-512 RX 800-950 [UHF side only] Note: The frequency ranges include the lower limit, but exclude the upper limit (i.e. 118-174 really means 118.000-173.995). Crossband repeat mod: Remove D4. Apparently, this mod is independent of the D5/D6 mods. 2. Undocumented Features Crossband Repeat: Press F for 1 second, then 0 [requires D4 mod] Repeat the same sequence to disable. Wideband RX: Press F for 1 second, then BAND [requires D5 mod] On the VHF side this yields 300-400 RX, on UHF 800-950 RX. Sample Channels: Press DUAL during power-up Programs some sample frequencies in VHF and UHF memory channels (it's a pain to undo the sample programming). Cloning: Press 0 during power-up [requires D5 or D6 mod] Allows cloning over the air. All keys except PTT and POWER are disabled. Press PTT to send DTMF cloning sequence. Presumably, receiving TH-78A must be in same mode. Toggle SHIFT/SPLIT Mode: Press SHIFT during power-up This is described in the manual, but the documentation is not complete. The TH-78A can operate in two modes: In SPLIT mode, non-standard offsets (i.e. split frequencies) are supported, but the default offset is not programmable. In SHIFT mode, non-standard offsets are not allowed, but the default offset is programmable. To select the default offset, press F for 1 second, then SHIFT. See p. 30 of the manual for details on changing the default offset. Toggle CALL Button Function: Press CALL during power-up. The CALL button can operate in one of two modes. In the default mode (CALLSW), it switches between the call channel and the last memory channel (if in memory recall mode) or last frequency (if in VFO mode). After toggling the CALL button functionality (VMC), it will switch from the VFO to the last memory channel and then back to the CALL channel. Game Mode: Press M and PTT during power-up [be careful not to accidentally reset the memory (M+POWER)] [Much of this was provided by james@brokaw.lcs.mit.edu] To exit the game mode at any time, press the LAMP key. It is not possible to change the volume, lamp, or frequency settings while in game mode. The top part of the display will show H.00, which represents the high score. The lower part shows a scrolling message, "PRESS ANY KEY". Pushing any key starts a "Follow Simon" type game. The display will briefly show one of the characters "1", "2", "3", or "F". Press the corresponding key. The game consists of repeating the displayed character sequence, which increases by one character each round. After you "win" the Simon memory game by getting correctly entering a sequence of twenty characters, the next game is a draw poker game. The way it works is that you choose your bet (from 1 to 10) by pressing 2 to increment the bet and 5 to decrement the bet. Then, press F to deal the five cards. The face value of the cards is displayed, and the suits can be seen at any time by holding down the PTT key. Any number of cards may be discarded, and to select (or deselect) a card for discarding, press the keys 1, 2, 3, 4, or 5. If a card is selected for discard, it is displayed "face-down". Press F again to draw new cards. Your new cards will be displayed, and then if your hand is 2-pair or better, the screen will show the rank of your hand on the left (2P for 2-pair, 4K for four-of-a-kind, etc.). On the right the pay- off for that hand will be displayed. Your bet is multiplied by the pay-off factor,and the resulting pile of cash is displayed in the right hand side of the upper screen. (The left hand side of the upper screen contains your table stakes, which are initially 100 coins from winning the Simon game.) If you win the poker hand, pressing any key steps into the next stage. If you lose the poker hand, your bet is deducted from your stakes and you are asked to start another poker hand. In the next stage, you are asked "TRYB/S" which means, "Do you want to try double-or-nothing in a guessing game for Big or Small cards?" Press F for yes, press TONE for no. If you say no, your winnings are credited into your stakes and you are asked to start another poker hand. If you say yes, then a single shuffling/incrementing card is displayed on the left, and three stars are displayed on the right. You have to choose to go for either BIG or SMALL, by pressing 2 or 5. You can keep pressing 2 and 5 to change your mind. When you are ready, you must try to hit the F key to stop the rotating card display, and the card will show, and you will either win, lose, or draw. If you draw, you have to play big/small again, I think. If you lose, your winnings are gone and you can play poker again. If you win, your winnings double and you are asked whether you want to play big/small again. The payoffs on the poker are set against you, odds-wise; the double-or-nothing game includes a draw, so the odds are against the player there unless you can time hitting the F key to win more than half the rounds. I haven't managed to do this, so I don't know if there is anything beyond this, all I know is that when the table stakes are exhausted, you go back to playing Simon again. [Version 1.1, 22 Juli 1992] ----------------------------------------------------------------------------- ----- Einde van bericht 11281 from KENWOOD TO ALL ----- PE1AGP de PI8VNW BBS > Date: 18 Oct 92 13:16 Message-ID: <0@OE9XPI> From: DD8GR@OE9XPI To: KENWOO@EU Subject: TH-78E expansion Path: PI8EAE!PI8HWB!PI8HRL!PI8AIR!DK0MWX!DB0EAM!DB0DNI!DB0FP ... de DD8GR @ OE9XPI.AUT.EU to KENWOOD @ EU From: DD8GR @ OE9XPI.AUT.EU To: KENWOOD @ EU Date: 18.10.92 Hi out there! Thanks for reading this message! With regards to my previous message on the subject of frequency expan- sion of this HT some days ago, I'll resume what I've found: Following I'll describe the configuration I've found in my HT (factory): ======================================================================== Copper or alike shield ^ I ___ ------------------- I I <--- IC 2 | __________ | I I | I I | I___I __ | I IC 7 I | I I <--- ME 1 socket | I I =| D1 I__I | I__________I =| D2 | =| D3 |________________=| D4 = D5 = D6 In my case the diodes were configured as follows: ------------------------------------------------- D1 D2 D3 D4 D5 D6 closed not present open closed closed open the "open" diodes are present but one side (right side when looked at from the top as above) bent about 45ø upwards. As per the circuit diagram included with the HT the following is possible: Version E E2 D1 open open D3 close close D5 close close D6 close open The way my HT came from the dealer it can receive all the ranges, +/- 50 to 180 Mhz., 400 to 512 and the 300 & 900 Mhz. segments. According to this all that was then needed to do was to close (solder the right side down of D3, I've done this an the HT now has a TX range of 136-172 and 400-512, of course I've tried this with a dummy load. Nothing else has changed, the key layout has also remained, note that the "A" version has a different keyboard layout. This makes it very attractive if you should travel to coutries like the USA where the ranges are somewhat different, the offset at 70 cm. can be changed to +/- 5,0 Mhz. anyway (if you do not know how: press SHIFT at power on then F1 for longer than 1 sec. and SHIFT and you can change the off-set to whatever you want). Proceed at your own risk and remember to always transmit within your allocated frequency range, by the way, a modification like this voids the guarantee (I would suggest that thae manufacturers put DIP switches for things like this in the future...) P.S.: Thanks to Aad, PE1AGP for the submitted information! PE1AGP de PI8EAE-mbx: on #2 Users: 2 H=Help B=Bye D,?,I,J,K,L,R,S,U,V } DIODE USE -------------------------------- D 1 = Select CHANNEL MODE D 2 = Select Country destin. D 3 = UHF limit range D 4 = Crossband RPT D 5 = Select County destin. D 6 = EXP. TX MOD EUROPE MATRIX (AIR BAND+300MHZ+900MHZ) = YES D1-D3-D4-D5 NO D2-D6 NOTE: THE DISPLAY SHOW 50 MHZ BUT "REALY" OPERATE FROM 91 MHZ AND UP ! LOW SENSIBILITY UHF & 900 MHz ----------------------------- For a good sensibility perform on the coil L51 and L52 on main board near the BNC socket. For a good sensibility on the extreme of band please repleace the L37 SMD COIL of 0.68 uH whit a 0.56 uH. -------------------------------------------------------------------------- ENABLE BAND 300MHz RX = in VHF push F for 1 sec. and push BAND ENABLE BAND 900MHz RX = in UHF push F for 1 sec. and push BAND NO DOCUMENTATE FUNCTION ======================= REPEATER CROSSBAND: Push key F for 1 second, and the key 0 (please remove the smd diode D4). EXPANSION RX: Push in VHF or UHF the key F for 1 sec, and BAND (remove smd diode D5) in VHF rx is 300-400 MHz in UHF 800-900 MHz. CONFIRM PAGER: Push MHZ and POWER ON the transceiver. You have the confirm whit the bell like the new Standard C-558 ! SHIFT PROGRAM.: Push SHIFT and POWER ON the transceiver. and the F for 1 second and the key SHIFT. You have on display 0.0 with step of 99.9 with step of 0.1. This function is ok for NO-Standard Shift, whitout delete the internal diode country destination matrix ! CLONING DATA: Push key 0 and POWER ON the transceiver (remove the smd diodes D5 D6).All the keys exept only the PTT and Power are not function. Push the PTT for start the cloning whit DTMF. CHANGE SHIFT/SPLIT: Push the SHIFT and POWER ON the transceiver. In Split Mode = you have offset non standard. In Shift Mode = not variable offset. CHANGE FUNZ.CALL: Push the key CALL and POWER ON the transceiver. The key CALL now have two functions: On default (CALLSW) = Function between channel memory and channel call and vfo. In other mode = function between vfo the last memory channel and return at call. GAMES: Push key M and PTT and ON the transceiver, you now have a 2 games, MEMORY GAME and CARD GAME (pocker). At the begin you are in Memory game and the access at the Pocker game is when in Memory game you have over 20 coin ! PLEASE PROTECT OUR LICENSES. DO NOT TRASMIT OUTSIDE OF LEGAL BANDS ! ******************************************************************* TH-78E EXPANSION Press "PTT" + "VFO" then "POWER ON". VHF band: 108-136MHz (AM) / 136-174MHz / 320-390MHz / 405-485MHz Note: In my case I found also 50-179.9875 MHz and 300-399.9875 MHz UHF band: 410-510MHz / 136-174MHz / 800-950MHz Note: In my case I found also 400-511 MHz By pressing "F" key for 1 sec. then press "BAND" key when in the "VFO" mode The VHF band switch from: >> "Amateur" >> "Air" >> "340MHz" and so on The UHF band switch from: >> "Amateur" >> "900MHz" and so on Note: Receiving mode of the 340MHz band can be switched from "FM" to "AM" by press and hold "VFO" key then "POWER ON" ------------------------------------------------------------------------------ TH-78E TX EXPANSION Remove the diode "D6" from the control unit. ------------------------------------------------------------------------------- TH-78E UHF band 432-438 MHz LIMITED RANGE Remove the diode "D3" from the control unit ------------------------------------------------------------------------------- CROSS BAND REPEATER Remove the diode "D4" from the control unit, then press "F" key for 1 sec. and press "0" key. ------------------------------------------------------------------------------- Good Luck ! Aad de PE1AGP @ PI8EAE ***************************************************************************** Datum Tijd : 920809 18:12 Aan : KENWOOD TO ALL Onderwerp : TH-78A Guide V1.1 Hello OM, the following information about the TH-78A was collected by Joakim Karlsson N1JHW. 73 de Django DL5YEC ----------------------------------------------------------------------------- The Complete Guide to Undocumented Features of the TH-78A Vervolg(return) of A --> The information contained in this document is derived from many sources. Unfortunately, I have not kept track of everyone who has provided input, but I would like to thank those who have helped me compile this information. This document is probably not complete: Please send any additions or corrections to aviator@athena.mit.edu (Internet) or n1jhw@ka1srd.#ema.ma.usa.na (amateur radio packet) or ma0226@ma1bbs.mawg.ner (Civil Air Patrol packet). I've had one report that the TH-78A is capable of in-band full duplex operation. I've been unable to repeat this on my unit, which only has the CAP/MARS mod perform. Confirmation of this feature would be appreciated. Please Note: I can take no responsibility for any problems which may be caused by attempting to access one of the features described here. This document may be distributed in its original Vervolg(return) of A --> form only, and not via packet radio. 1. Hardware Mods Hardware modifications for the TH-78A are performed by manipulating a series of 6 surface mounted diodes, identified as D1 through D6. The TH-78A block diagram contains a table identifying 7 configurations involving D2, D3, D5, and D6. However, none of the configurations described below are included in that table. To open the radio, follow the instructions on p. 64 of the manual. The two TX/RX busy indicators (LEDs) have rubber seals placed over them. These have a tendency to fall off when opening or closing the radio. The diodes are located on the CPU board, which is mounted inside the front panel of the radio. The CPU board is readily identified by a brass shield covering the CPU, as well as the Vervolg(return) of A --> socket for the ME-1 memory expansion chip. All position references in this document assume that you are looking at the CPU board with the rotary encoders and TX/RX busy indicators at the top. If you have installed the ME-1 EEPROM, I recommend that you temporarily remove it to facilitate access to the diodes. The diodes are located in a vertical row just below the lower right corner of the brass shield. The diodes are numbered sequentially, starting with D1 at the top. The U.S. stock configuration has all diodes in place. The function of D1 is not known at this time. D2, D3, D5, and D6 are thought to control TX and RX ranges. D4 controls cross-band repeat. Before removing a diode, Kenwood recommends unsoldering the brass shield. There are four solder points, one at each corner. The brass shield is attached to the CPU with a small piece of double- sided adhesive tape. An alternate method consists of unsoldering Vervolg(return) of A --> the right side of the appropriate diodes, which are visible underneath the shield, and bending them to approximately a 45 degree angle, forming an open circuit. The two verified mods involving D5 and D6 are as follows: CAP/MARS mod: Remove D6 only. Yields RX 118-174 TX 142-152 RX 400-512 TX 425-455 Beyond MARS mod: Remove D5 only. Yields RX 50-180 TX 136-180 RX 300-400 [VHF side only] RX 400-512 TX 400-512 RX 800-950 [UHF side only] Note: The frequency ranges include the lower limit, but exclude the upper limit (i.e. 118-174 really means 118.000-173.995). Vervolg(return) of A --> Crossband repeat mod: Remove D4. Apparently, this mod is independent of the D5/D6 mods. 2. Undocumented Features Crossband Repeat: Press F for 1 second, then 0 [requires D4 mod] Repeat the same sequence to disable. Wideband RX: Press F for 1 second, then BAND [requires D5 mod] On the VHF side this yields 300-400 RX, on UHF 800-950 RX. Sample Channels: Press DUAL during power-up Programs some sample frequencies in VHF and UHF memory channels (it's a pain to undo the sample programming). Cloning: Press 0 during power-up [requires D5 or D6 mod] Allows cloning over the air. All keys except PTT and POWER are disabled. Press PTT to send DTMF cloning sequence. Presumably, receiving TH-78A must be in same mode. Vervolg(return) of A --> Toggle SHIFT/SPLIT Mode: Press SHIFT during power-up This is described in the manual, but the documentation is not complete. The TH-78A can operate in two modes: In SPLIT mode, non-standard offsets (i.e. split frequencies) are supported, but the default offset is not programmable. In SHIFT mode, non-standard offsets are not allowed, but the default offset is programmable. To select the default offset, press F for 1 second, then SHIFT. See p. 30 of the manual for details on changing the default offset. Toggle CALL Button Function: Press CALL during power-up. The CALL button can operate in one of two modes. In the default mode (CALLSW), it switches between the call channel and the last memory channel (if in memory recall mode) or last frequency (if in VFO mode). After toggling the CALL button functionality (VMC), it will switch from the VFO to the last memory channel and then back to the CALL channel. Vervolg(return) of A --> Game Mode: Press M and PTT during power-up [be careful not to accidentally reset the memory (M+POWER)] [Much of this was provided by james@brokaw.lcs.mit.edu] To exit the game mode at any time, press the LAMP key. It is not possible to change the volume, lamp, or frequency settings while in game mode. The top part of the display will show H.00, which represents the high score. The lower part shows a scrolling message, "PRESS ANY KEY". Pushing any key starts a "Follow Simon" type game. The display will briefly show one of the characters "1", "2", "3", or "F". Press the corresponding key. The game consists of repeating the displayed character sequence, which increases by one character each round. After you "win" the Simon memory game by getting correctly entering a sequence of twenty characters, the next game is a draw poker game. The way it works is that you choose your bet Vervolg(return) of A --> (from 1 to 10) by pressing 2 to increment the bet and 5 to decrement the bet. Then, press F to deal the five cards. The face value of the cards is displayed, and the suits can be seen at any time by holding down the PTT key. Any number of cards may be discarded, and to select (or deselect) a card for discarding, press the keys 1, 2, 3, 4, or 5. If a card is selected for discard, it is displayed "face-down". Press F again to draw new cards. Your new cards will be displayed, and then if your hand is 2-pair or better, the screen will show the rank of your hand on the left (2P for 2-pair, 4K for four-of-a-kind, etc.). On the right the pay- off for that hand will be displayed. Your bet is multiplied by the pay-off factor,and the resulting pile of cash is displayed in the right hand side of the upper screen. (The left hand side of the upper screen contains your table stakes, which are initially 100 coins from winning the Simon game.) Vervolg(return) of A --> If you win the poker hand, pressing any key steps into the next stage. If you lose the poker hand, your bet is deducted from your stakes and you are asked to start another poker hand. In the next stage, you are asked "TRYB/S" which means, "Do you want to try double-or-nothing in a guessing game for Big or Small cards?" Press F for yes, press TONE for no. If you say no, your winnings are credited into your stakes and you are asked to start another poker hand. If you say yes, then a single shuffling/incrementing card is displayed on the left, and three stars are displayed on the right. You have to choose to go for either BIG or SMALL, by pressing 2 or 5. You can keep pressing 2 and 5 to change your mind. When you are ready, you must try to hit the F key to stop the rotating card display, and the card will show, and you will either win, lose, or draw. If you draw, you have to play big/small again, I think. If you lose, your winnings are gone and you can play poker again. If you win, your winnings double and you are asked whether you want to play big/small again. Vervolg(return) of A --> The payoffs on the poker are set against you, odds-wise; the double-or-nothing game includes a draw, so the odds are against the player there unless you can time hitting the F key to win more than half the rounds. I haven't managed to do this, so I don't know if there is anything beyond this, all I know is that when the table stakes are exhausted, you go back to playing Simon again. [Version 1.1, 22 Juli 1992] ----------------------------------------------------------------------------- ****************************************************************************