From: Date: Wednesday, 28 Oct 1992 10:13:09 CST Newsgroups: rec.radio.amateur.misc Organization: University of Illinois at Chicago Message-ID: <92302.101309U27387@uicvm.uic.edu> Subject: Standard HT 528 receive mods (999MHz) Lines: 27 This simple key-in sequence will enable the Standard 528 twin band HT to receive out of band signals up 999MHz. 1) enter UHF side (UHF is main) 2) enter VFO mode 3) push F + L (function key + light key) 4) then F + 0 (function key + zero key) 5) next F + code (funtion key + code key) 6) then F + L (function key + light key (again)) 7) next F + 3 (function key + three key) 8) then PTT (push to talk button) Now your in! To change bands you have to press F + 0 followed by F + 3 , this is the toggle function. Each time you enter the F + 0 and F + 3 the receiver will jump bands. To get back to 440 (where you started from) keep using the toggle sequence. If you did something wrong and the HT losses its mind DON'T PANIC! Just push the microproc. reset button. I have done this keyboard entery mod to my HT and it works. The sensitivity isn't great, but you can pick up any- thing that has a strong signal. This information was obtained from the local Standard representitive in Chicago. I'm sure there are other things This radio can do that I am not aware of, but when I find out I will post it here just for the heck of it. P.S. If I made a mistake in the key sequence list above I will post any corrections by the end of this week 10/30/92. good luck! Chris... Newsgroups: rec.radio.amateur.misc From: Lawrie.Brown@adfa.oz.au Subject: Re: Standard HT 528 receive mods (999MHz) Message-ID: <1992Nov3.061703.18332@sserve.cc.adfa.oz.au> Sender: news@sserve.cc.adfa.oz.au Organization: Australian Defence Force Academy, Canberra, Australia References: <92302.101309U27387@uicvm.uic.edu> Date: Tue, 3 Nov 1992 06:17:03 GMT Lines: 55 writes: >This simple key-in sequence will enable the Standard 528 twin band HT >to receive out of band signals up 999MHz. I too have a Standard C528 (as do quite a few of the other local amateurs here), and I'm very happy with it. In addition to the sequence you gave, there is also a (longer) sequence which enables wide-band transmit (how wide I don't know as I've no need to use it). There are also quite a few additional functions available off the keyboard from those documented. Appended below this is a table (which I keep as an Excel spreadsheet), listing the various functions in rather abbreviated form - I'd be very interested in learning about any others. Note the extra memory channels - there are actually 20 on each band, the upper 10 are accessed as shown below (accesed with a F+A prefix key, and displayed with a bar over the number). You can't use them in band scanning, but apart from that they function as normal memories. Cheers Lawrie Brown VK1KLB Standard C528 Keystroke Cheat-sheet Key\Seq key F+key Set,key Set,F+key ============================================================================= 0 0 Set / Scan mode Mute beep Set freq limits 1 1 PTT Lock # Pager beeps 2sec xbRPT delay 2 2 Dual Operation 1 kHz entry Tone scan stop 3 3 TX Power Pager TX delay UHF band switch 4 4 Freq lock Squelch mute 4 digit entry 5 5 Battery save Auto Power save Mute pager audio 6 6 Tuning step Rotary enable in FL 1MHz step 7 7 Tone coder on/off Set Tone freq DTMF single tone 8 8 Repeater mode Set Offset freq Crossband RPT 9 9 Reverse mode LAMP is REV 10MHz up/down * PS step DOWN Dial/Tone Scan DTMF Clone # SIFT step UP Memory freq shift Call Tone burst A CL Cancel B PAG Page on/off Page code set/show C MS MS.M Mem scan MS.M set/scan D V/M ENT Mem<->Dial Memory set VHF VHF main VHF only UHF UHF main UHF only LAMP Lamp on/off Lamp toggle SQL OFF Squelch off sub-band sql off ============================================================================= Other Key Sequences ============================================================================= Wideband RX: Reset, VHF, F+0, F+D, PTT, UHF, F+L, F+0, F+B, F+L, F+3, PTT Wideband TX: VHF, F+6, PTT, F+8, F+8, F+7, F+7, F+C, rotate down 1, " F+0, F+D, PTT, F+8, F+C, F+0, F+4 (F+0, F+3)*4 Set Upper 10 Memory channels: F+D, F+A, num ============================================================================= Newsgroups: rec.radio.amateur.misc From: wa2ise@cbnewsb.cb.att.com (robert.f.casey) Subject: C528 extended RX/TX and other keyboard mods file Message-ID: <1992Dec14.151833.9694@cbfsb.cb.att.com> Keywords: mods Sender: news@cbfsb.cb.att.com Organization: AT&T Date: Mon, 14 Dec 1992 15:18:33 GMT Lines: 186 received this on packet: Msg# TSF Size #Rd Date Time From MsgID To 30546 PY 4803 1 03-Dec 1626 G7IED 27645_GB7LAN WA2ISE () Sb: C528 Here is a little mods list. I find the 40ch mem a bit messy so I don't use it and you can get the phone tones by pressing the ptt and a number on the pad. Hope this is of help to you 73s Ralph V7 The 520/28 is very flexible capable of TX RX on 122.825 to 176.800MHz and 328.000 to 473.125MHz. And RX only on 820.225 to 972.500MHz. The following are not in the owners book. F=FUNC L=LIGHT ______________________________________ There are two ways to set Rx wide band if you press reset you will need this (A) 1 F + VHF 2 F + 0 3 F + D 4 RELEASE F 5 PRESS UHF 6 F + 0 7 F + D 8 F + L 9 F + B 10 F + 3 11 F + 0 12 F + 3 13 F + 0 14 F + 3 15 F + L TO CANCEL RESET? ______________________________________ (B) 1 F + 0 2 F + D 3 PTT ON 145.00MHz IS DISPLAYED 4 PRESS VHF 5 F + L 6 F + 0 7 F + B 8 F + L 9 F + 3 10 PTT ON 433.00MHz IS DISPLAYED TO CANCEL RESET? THE RX IS NOW WIDE BAND FOR TX CONTINUE BELOW ______________________________________ TX WIDE BAND PROCEDURE 1 VHF 2 F + 6 3 CHANGE FREQUENCY STEP FROM 10KHz TO 12.5KHz BY ROTARY SELECTOR 4 PTT ON 145.00MHz IS DISPLAYED 5 F + 8 6 F + 8 CONFIRM T AND + IN DISPLAY 7 F + 7 8 F + 7 9 F + C 10 SET 144.9875 BY ROTARY SELECTOR 11 CONFIRM THE SMALL 75 ON DISPLAY 12 F + 0 13 F + D 14 PTT ON 15 F + 8 16 F + C TO CANCEL RESET? _____________________________________ TO TOGGLE BETWEEN 3-400 AND 8-960 MHz 1 SET MAIN BAND TO UHF 2 F + 0 3 F + 3 ______________________________________ DIRECT 4 DIGIT KEY INPUT 1 F + 0 2 F + 4 DISPLAYS A . BETWEEN 2nd AND 3rd DIGIT TO CANCEL REPEAT ABOVE ______________________________________ 10 MHz SHIFT BY UP/DOWN KEYS 1 F + 0 2 F + 9 TO CANCEL REPEAT ABOVE ______________________________________ 40 CHANNALS MEMORY THERE ARE 2 MEMORY CHANNELS PER MEMORY NO ON VHF AND UHF. THEY CAN BE USED IN 2 WAYS. (A)TO PROVIDE PROGRAMBLE RX TX FREQUENCIES (B)TO DOUBLE THE SIMPLEX CHANNELS AVAILIDLE (A) 1 SELECT RX FREQ (VFO MODE) 2 F + D 3 PRESS MEMORY NO TO BE PROGRAMMED 4 D 5 SELECT TX FREQUENCY 6 F + D 7 F + THE MEMORY NO TO BE PROGRAMMED + - WILL APPEAR INDICATES THAT MEMORY CHANNEL IS IN SPLIT FREQUENCY MODE ONCE A MEMORY IS IN SPLIT MODE IT CANNOT BE CHANGED BACK TO A SINGLE MEMORY UNLESS ITS PROGRAMMED AS A EXTRA CHANNEL (SEE BELOW) OR RESET F + 9 WILL SWAPP RX AND TX (B) EXTEND TO 40 MEMORIES PROGRAM FIRST 10 MEMORIES IN EACH BAND TO PROGRAM ADDITIONAL 10 MEMORIES 1 SELECT FREQUENCY (VFO MODE) 2 F + D _ 3 F + A AN M WILL APPEAR 4 PRESS MEMORY NO TO BE PROGRAMMED TO RECALL EXTRA MEMORIES USE ROTARY CONTROL IN MEMORY MODE OR ENTER MEMORY MODE AND PRESS F + A THE M AND BAR APPEARS PRESSING 0 TO 9 WILL RECALL EX CHANNELS THE EX CHANNELS CAN HAVE REP SHIFT AND CTCSS TONES BUT VALUE WILL BE THE SAME FOR BOTH CHANNELS IN ONE MEMORY ______________________________________ DTMF CLONE COPYS YOUR SETTINGS TO ANOTHER 520/28 TUNE BOTH RADIOS TO SAME FREQUENCY 1 B P IS DISPLAYED 2 B C IS DISPLAYED 3 F + 0 4 F + PS 5 PTT ONLY ON THE RADIO THAT CONTAINS THE MEMORY DATA A SERIES OF TONES WILL BE HEARD FOR APPROX 2 MINUTES THE RADIO MEMORYS WILL NOW BE IDENTICAL ______________________________________ DTMF SINGLE TONE 1 F + 0 2 F + 7 TO CANCEL REPEAT ABOVE ______________________________________ MUTING THE AUDIO OUTPUT OF PAGER 1 F + 0 2 F + 5 TO CANCEL REPEAT ABOVE ______________________________________ TONE SQUELCH SCAN STOP 1 F + 0 2 F + 2 TO CANCEL REPEAT ABOVE ______________________________________ H.H.TRANSPONDER SUB BAND TO MAIN 1 F + 0 2 F + 8 A . APPEARS TOP RIGHT OF MEMORY NO TO CANCEL SET SUB BAND ON CLEAR FREQUENCY BY ROTARY SELECTOR AND PRESS UHF OR VHF _____________________________________ TOGGELS BETWEEN 100KHz AND 1MHz STEPS ON ROTARY SELECTOR WHEN FUNC IS PRESSED (FAST TUNING RATE) 1 F + 0 2 F + 6 _____________________________________ SET FREQUENCY LIMIT ON EACH BAND 1 F + 0 2 F + 0 ______________________________________ SET TX HANG DURING TRANAPONDER FUNC 1 F + 0 2 F + 1 ______________________________________ Be very carfull with the h.h.transponder and wide band tx func. 73s Ralph G7IED @ GB7FCI Note: I haven't tried or verified this, proceed at your own risk. And do not transmit outside of legal bands! WA2ISE ============================================================================== Newsgroups: rec.radio.amateur.misc From: wtm@uhura.neoucom.edu (Bill Mayhew) Subject: Here is MARS/CAP expansion for Std. C528A or Hth. HW-24-T Message-ID: <1993Jul17.115415.14940@uhura.neoucom.edu> Summary: Opening radio / soldering NOT required. Organization: Northeastern Ohio Universities College of Medicine Date: Sat, 17 Jul 1993 11:54:15 GMT Lines: 97 Here is a copy of the original sheet form Heathkit. The ht-24-t is abosolutely identical to the C528A. Both are manufactured by Marantz of Japan. Note: I did not need to press reset before entering the modification sequence. The memories I had programmed stayed intact. Note: If you change UHF bands, the contents of whatever memory is up when you change bands may be modified. Be sure to change to VFO mode before changing bands. The radio transmits anywhere, excpet for the 800-900 MHz region. Note: You need an apropriate license to transmit on the freqencies enabled by the expansion process. Unauthorized transmissions may be lead to undesirable attention, emberassment and action by unsympathetic government agencies. In some locations, it may not be lawful to montior and/or disclose content of trnasmissions in the 800-900 MHz region. Use discression. Note: Not responsible for scanning errors in text below. This came from the original Heath sheet and I've checked it carefully. Use at your own risk. Question: Does anybody know if there is a function code on the C528A that enables muting of the speaker on the opposite band when transmitting? I am interested in using the radio on UHF/VHF split, and want to avoid audio feedback. 73, Bill ------------------- begin included text ------------------ HEATH COMPANY TECHNICAL ASSISTANCE BENTON HARBOR, MICHIGAN 49022 616-982-3296 MARS and CAP modification for HW-24-T Dear Customer: In order to modify your Heath HW-24-T handheld transceiver to transmit out of band, please enter the code below from your keypad. After the code is entered you can use your transceiver to transmit on the CAP and MARS frequencies. Please keep this modification procedure in a safe place. If you ever reset your transceiver, you will need to enter the code again. -- Push RESET -- Press FUNCTION (hold) and 0 -- Press FUNCTION (hold) and ENT -- Press PTT (briefly) -- Press UHF -- Press FUNCTION (hold) and L (lamp) -- Press FUNCTION (hold) and 0 -- Press FUNCTION (hold) and CODE -- Press FUNCTION (hold) and L (lamp) -- Press FUNCTION (hold) and 3 -- Press PTT (briefly) -- Press VHF -- Press FUNCTION (hold) and STEP -- Select 12.5 KHz (with rotary selector knob) -- Press PTT (briefly) -- Press FUNCTION (hold) and 8 -- Press FUNCTION (hold) and 8 -- Press FUNCTION (hold) and 7 -- Press FUNCTION (hold) and 7 -- Press FUNCTION (hold) and MS.M -- Select 144.9875 MHz. (with rotary selector knob) -- Press FUNCTION (hold) and 0 -- Press FUNCTION (hold) and ENT -- Press PTT (briefly) -- Press FUNCTION (hold) and 0 -- Press FUNCTION (hold) and MS.M -- Press PTT (briefly) In addition to transmitting out of band, you can also receive the frequencies between 300 - 400 and 800 - 900 MHz. To do this use the code below. -- Press UHF -- Press FUNCTION (hold) and SET -- Press FUNCTION (hold) and 3 (this will select bands) ---- end of included text ---- -- Bill Mayhew NEOUCOM Computer Services Department Rootstown, OH 44272-9995 USA phone: 216-325-2511 wtm@uhura.neoucom.edu amateur radio 146.58: N8WED ============================================================================ From njitgw.njit.edu!rutgers!jvnc.net!yale.edu!spool.mu.edu!uunet!mcsun!uknet!slxsys!ibmpcug!demon!news Sat May 23 12:46:45 EDT 1992 Article: 18926 of rec.radio.amateur.misc Path: njitgw.njit.edu!rutgers!jvnc.net!yale.edu!spool.mu.edu!uunet!mcsun!uknet!slxsys!ibmpcug!demon!news From: dplumb@cix.compulink.co.uk (Dave Plumb) Newsgroups: rec.radio.amateur.misc Subject: Standard C528 Message-ID: <1992May22.065913.553@demon.co.uk> Date: 22 May 92 06:59:13 GMT Sender: dplumb@cix.compulink.co.uk Reply-To: Dave Plumb Organization: Gated to News by demon.co.uk Lines: 133 Is the Standard C528 in use out there in the states, and does anyone have any other mods for the set barring these: Standard C520/C528 Modifications ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ This file is a compendium from to others being bandied about the place. It is hoped this will be the better of them, being the easiest to follow! o To open up the rx only up on the unit on VHF: VHF F+0 F+D o To add 320-400MHz, 400-480MHz, 820-900MHz, 900-980MHz: UHF F+L F+0 F+B F+L F+3 A o To Expand Tx/Rx coverage, do both the above in that order, then: VHF F+6 change step to 12.5MHz A F+8 F+8 F+C Tune down to 144.9875 F+0 F+D PTT F+8 F+C o To Store independent transmit/receive frequency in one channel: Enter receive frequency into dial F+D Enter transmit frequency into dial F+D F+A F+ A o To Clear the tx assignment offset: F+D F+A +A F+A A o To Clone one set to another: B B F+0 F+PS then key up on the set to clone from Set mode key assignments: The set mode allows a number of user parameters to be customised according to individual taste. Set mode is initiated by pressing F+0. The following are entered after going into set mode: 0 Turns off the beep tones on each keypress F+0 Sets band edge limits, i.e. 0079=100-179, 400-479. 3060=130-160 1 Changes count of paging operations tone, one beep or 5 F+1 Set tx delay on carrier drop when using as cross-band repeater 2 Enables entry of the 1kHz figure on direct keypad entry F+2 Stop scan on busy channel even if CTCSS doesn't match 3 Sets mod delay on paging Tx to either 450ms or 750ms F+3 Switch UHF bands between 300/400/800/900 4 Mutes short noises during squelch operation F+4 Keypad entry of 4 digit or 3 digit frequency 5 Turns on and off the auto power off function F+5 Pager Audio Mute (effectively disables pager) 6 Enable/Disable the rotary channel knob when keypad locked F+6 Fast tune (F+KNOB) gives either 1MHz steps, or 100kHz 7 Sets the CTCSS tone frequency F+7 Either Dual Tone Multi Frequency, or Single Tone Frequency 8 Sets the offset repeater frequency F+8 Cross Band Repeater Enable/Disable (Identified on display by a ".") 9 Changes the LAMP button into the REV button F+9 Up and Down keys either act as the knob, or as 10MHz steps. Quick Chart: /---------------------------------------------------------------------------\ | Standard C520/528 - Keypad Guide | |---------------------------------------------------------------------------| |Key| Alone | With "FUNC" key | Key alone in set |In Set With "F" | |---------------------------------------------------------------------------| | 0 | 0 |Enter Set Mode |Mute keypad bleep |Set Band Edge Limit| | 1 | 1 |Disable Transmitter |1/5 beeps when paged|Tx wait on c-b rept| | 2 | 2 |Dual Watch Operation|1kHz entry on keypad|CTCSS Scan Stop | | 3 | 3 |Select Output Power |Tx Delay on repeater|Switch UHF Bands | | 4 | 4 |Frequency Lock |Mute during squelch |4/3 digit direct fr| | 5 | 5 |Battery Saver Mode |Automatic powr off |Pager Audio Mute | | 6 | 6 |Select Step Size |Enable tune in lock |Fast tune 1MHz/100k| | 7 | 7 |CTCSS select TX/RX |CTCSS tone frequency|Single/Dual tone MF| | 8 | 8 |Repeater Shift +/- |Set Tx/Rx split freq|Cross Band Repeater| | 9 | 9 |Reverse Split |Make LAMP button REV|Up/Dn keys do 10MHz| | * |Step Down|Search 1MHz band | | | | # |Step Up |Memory Shift | | | | A |Cancel | | | | | B |Pager On |Set Pager Codes | | | | C |Mem Scan |Partial Memory Scan | | | | D |Dial/Mem |Store Dial In Memory| |Extend RX coverage | |VHF|Tx VHF |Enable VHF Only | | | |UHF|Tx UHF |Enable UHF Only | | | |---------------------------------------------------------------------------| | To expand Rx coverage only | |---------------------------------------------------------------------------| | VHF F+0 F+D | |---------------------------------------------------------------------------| | To add 320-400,400-480,820-900,900-980 | |---------------------------------------------------------------------------| | UHF F+L F+0 F+B F+L F+3 A | |---------------------------------------------------------------------------| | To Expand Tx and Rx coverage: | |---------------------------------------------------------------------------| | VHF F+0 F+D A ; Extends RX coverage | | UHF F+L F+0 F+B F+L F+3 A ; Gives 300/800/900MHz | | VHF F+6 step to 12.5MHz A ; This appears to set a special condition | | F+8 F+8 F+C ; within the unit which is stored with F+C. | | tune down to 144.9875 ; All params must be correct for it to work | | F+0 F+D PTT F+8 F+C ; And Store it | |---------------------------------------------------------------------------| | To store independent transmit and receive frequency in one memory channel | |---------------------------------------------------------------------------| | Enter receive frequency into dial | | F+D | | Enter transmit frequency into dial | | F+D F+A F+ A | |---------------------------------------------------------------------------| | To remove independent transmit frequency from memory | |---------------------------------------------------------------------------| | F+D F+A +A F+A A | |---------------------------------------------------------------------------| | To clone one set to another | |---------------------------------------------------------------------------| | B B F+0 F+PS on both sets, and PTT on the one to clone from | \---------------------------------------------------------------------------/ Origin: 2:252/140 @ fidonet.org ============================================================================= From: marttanen@ds04.dco.ntc.nokia.com ( Kari 'Kama' Marttanen) Newsgroups: rec.radio.amateur.misc Subject: Extra functions for Standard C528/520 Message-ID: <1992Aug21.234542.1@ds04.dco.ntc.nokia.com> Date: 21 Aug 92 21:45:42 GMT Sender: usenet@noknic.nokia.fi (USENET at noknic) Organization: Nokia Data Communications Lines: 86 Nntp-Posting-Host: ds04.dco.ntc.nokia.com EXTRA FUNCTIONS FOR THE STANDARD C520/528 ----------------------------------------- 1). ADDITIONAL FUNCTIONS WHILST IN "SET MODE" While holding the [FUNC] button press the [0/SET SB] button to enter set mode. (See Section 15 in manual). Whilst still in set mode the following btttons can be pressed, together with the [FUNC] button, to provide the these functions BUTTON FUNCTION ------ -------- [3/PO] Changes band in use in extended coverage mode (UHF Only) i.e. 300 MHz / 400 MHz / 800 MHz / 900 MHz [4/FL DM] Displays a "." between 2nd & 3rd Digit. What else it does is a mystery, if anyone knows please let me know. [6/STEP] Toggles the tunning steps on the knob on top whilst [FUNC] is depressed, between 1MHz and 0.1 MHz. [8/RPT] Enables / Disables Cross band talk through mode. When Enabled a "." appears to the top right of the memory number position. [9/REV] Toggles UP and DOWN buttons between the normal steps and 10 MHz steps. [DWN/* PS] Enter cloning mode. Transfers all memory data between 2 x C520/528`s. Tune both radios to the same frequency on one of the bands. Enter cloning mode on both radios. Press PTT on hhe radio that contains the memory data, A series of DTMF tone will be heard for approx 2 minutes. The receiving radio`s memories will now be identical to the transmitting radio. 2). EXTRA MEMORY FUNCTIONS, 40 MEMORY CHANNELS or SEPARATE TX/RX FREQ`S Although the standard manual states that 20 memories are available split between VHF and UHF bands, in fact there are 2 memory channels for each memory number on the VHF and UHF bands. These can be used in 2 ways. One way is to double the number of simplex channels availible, another is to provide programable RX and TX frequencies for each memory number. a) PROGRAMMING SEPARATE RX & TX FREQUENCIES IN ONE MEMORY LOCATION 1. In VFO mode select your RX frequency 2. Press [FUNC] and [V/M ENT] buttons together 3. Press the memory number to be programmed 4. Press [V/M ENT] button to return to VFO mode 5. Select your TX frequency. 6. Press [V/M ENT] and [FUNC] buttons together 7. Press [FUNC] button together with the memory number to program "+-" Will appear in the repeater shift display to indicate that the memory channel is now in split frequency mode. Once a memory location has been put into split frequency mode it cannot be changed back to a simplex memory unless it is programmed as an extra channel (see below) or a RESET is carried out. Pressing [FUNC] and [9/REV] will cause the RX and TX frequencies to be swapped. b) PROGRAMMING EXTRA MEMORY CHANNELS, EXTENDS TO 40 MEMORIES. Program the first 10 memories on each band as per the manual. To program the additional 10 memories on each band follow the instructions below. 1. In VFO mode select the frequency required. 2. Press [FUNC] and [V/M ENT] buttons together. _ 3. Press [FUNC] and [A/CL] Buttons together. (an M will be displayed) 4. Press the memory number to be programmed To recall these extra memories. Either use the rotary tunning control in memory mode, which will now cycle through all programmed memories. Or enter memory mode and press [FUNC] and [A/CL] together and the bar will appear above "M" indicator as when it was programmed, pressing buttons 0 to 9 will then recall the extended channels. The extended memory channels can have repeater shifts and CTCSS tones programmed in to them in the normal way BUT the value of the repeater ofset and the frequency of the CTCSS tone will be the same for both of the channels stored in one memory location. i.e memory 1 and -1 will both have the same repeater ofset but if the ofset is not activated on channel -1 then it can be used as a simplex channel. ============================================================================== From: dplumb@cix.compulink.co.uk (Dave Plumb) Newsgroups: rec.radio.amateur.misc Subject: Extra functions for Standard C528/520 Message-ID: Date: 22 Aug 92 16:29:54 GMT Sender: usenet@gate.demon.co.uk Reply-To: dplumb@cix.compulink.co.uk Lines: 97 Cc: dplumb@cix.compulink.co.uk All the functions for the standard C528 are as below. If anyone out there has any that aren't listed, please mail to me! Standard C520/C528 Modifications ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ This file is a compendium from to others being bandied about the place. It is hoped this will be the better of them, being the easiest to follow! o To open up the rx only up on the unit on VHF: VHF F+0 F+D o To add 320-400MHz, 400-480MHz, 820-900MHz, 900-980MHz: UHF F+L F+0 F+B F+L F+3 A o To Expand Tx/Rx coverage, do both the above in that order, then: VHF F+6 change step to 12.5MHz A F+8 F+8 F+C Tune down to 144.9875 F+0 F+D PTT F+8 F+C o To Store independent transmit/receive frequency in one channel: Enter receive frequency into dial F+D Enter transmit frequency into dial F+D F+A F+ A o To Clear the tx assignment offset: F+D F+A +A F+A A o To Clone one set to another: B B F+0 F+PS then key up on the set to clone from Set mode key assignments: The set mode allows a number of user parameters to be customised according to individual taste. Set mode is initiated by pressing F+0. The following are entered after going into set mode: 0 Turns off the beep tones on each keypress F+0 Sets band edge limits, i.e. 0079=100-179, 400-479. 3060=130-160 1 Changes count of paging operations tone, one beep or 5 F+1 Set tx delay on carrier drop when using as cross-band repeater 2 Enables entry of the 1kHz figure on direct keypad entry F+2 Stop scan on busy channel even if CTCSS doesn't match 3 Sets mod delay on paging Tx to either 450ms or 750ms F+3 Switch UHF bands between 300/400/800/900 4 Mutes short noises during squelch operation F+4 Keypad entry of 4 digit or 3 digit frequency 5 Turns on and off the auto power off function F+5 Pager Audio Mute (Mutes any audio that follows the paging signal) 6 Enable/Disable the rotary channel knob when keypad locked F+6 Fast tune (F+KNOB) gives either 1MHz steps, or 100kHz 7 Sets the CTCSS tone frequency F+7 Either Dual Tone Multi Frequency, or Single Tone Frequency 8 Sets the offset repeater frequency F+8 Cross Band Repeater Enable/Disable (Identified on display by a ".") 9 Changes the LAMP button into the REV button F+9 Up and Down keys either act as the knob, or as 10MHz steps. /---------------------------------------------------------------------------\ | Standard C520/528 - Keypad Guide | |---------------------------------------------------------------------------| |Key| Alone | With "FUNC" key | Key alone in set |In Set With "F" | |---------------------------------------------------------------------------| | 0 | 0 |Enter Set Mode |Mute keypad bleep |Set Band Edge Limit| | 1 | 1 |PTT Lock |1/5 beeps when paged|Tx wait on c-b rept| | 2 | 2 |Dual Watch |1kHz entry on keypad|Match CTCSS on scan| | 3 | 3 |Output Power |Tx Delay on repeater|Switch UHF Bands | | 4 | 4 |Frequency Lock |Mute noises dur sql |Dir Input 4/3 figrs| | 5 | 5 |Battery Saver |Automatic power off |No audio after page| | 6 | 6 |Select Step Size |Enable tune in lock |Fast tune 1MHz/100k| | 7 | 7 |CTCSS select TX/RX |CTCSS tone frequency|Single/Dual tone MF| | 8 | 8 |Repeater Shift +/- |Set Tx/Rx split freq|Cross Band Repeater| | 9 | 9 |Reverse Repeat Shift|Make LAMP button REV|Up/Dn keys do 10MHz| | * |Step Down|Search 1MHz band | | | | # |Step Up |Memory Shift | | | | A |Cancel | | | | | B |Pager On |Set Pager Codes | | | | C |Mem Scan |Partial Memory Scan | | | | D |Dial/Mem |Store Dial In Memory| |Extend RX coverage | |---------------------------------------------------------------------------| | Expand:VHF F+0 F+D A | Independent Transmit/Receive Frequency | | UHF F+L F+0 F+B F+L F+3 A | [Rx] F+D [Tx] F+D F+A F+ A | | VHF F+6 step to 12.5MHz A | Remove Independent Tx Freq From Memory | | F+8 F+8 F+C | F+D F+A +A F+A A | | tune down to 144.9875 | Clone One Set To Another | | F+0 F+D PTT F+8 F+C | B B F+0 F+* [PTT] on source set | \---------------------------------------------------------------------------/ Origin 2:252/140 @ fido :: 17/09/91 :: sysop@f140.n252.z2.fidonet.org Msg Nr. : 49388 Da : IW3GRX Per : MOD Tipo/status : PN Data/ora : 0521/2136 Dimensione :10518 Titolo : Alcune modifiche per il C528 Bid (Mid) : 4325_IW3GRW ллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллл From: Date: Wednesday, 28 Oct 1992 10:13:09 CST Newsgroups: rec.radio.amateur.misc Organization: University of Illinois at Chicago Message-ID: <92302.101309U27387@uicvm.uic.edu> Subject: Standard HT 528 receive mods (999MHz) Lines: 27 This simple key-in sequence will enable the Standard 528 twin band HT to receive out of band signals up 999MHz. 1) enter UHF side (UHF is main) 2) enter VFO mode 3) push F + L (function key + light key) 4) then F + 0 (function key + zero key) 5) next F + code (funtion key + code key) 6) then F + L (function key + light key (again)) 7) next F + 3 (function key + three key) 8) then PTT (push to talk button) Now your in! To change bands you have to press F + 0 followed by F + 3 , this is the toggle function. Each time you enter the F + 0 and F + 3 the receiver will jump bands. To get back to 440 (where you started from) keep using the toggle sequence. If you did something wrong and the HT losses its mind DON'T PANIC! Just push the microproc. reset button. I have done this keyboard entery mod to my HT and it works. The sensitivity isn't great, but you can pick up any- thing that has a strong signal. This information was obtained from the local Standard representitive in Chicago. I'm sure there are other things This radio can do that I am not aware of, but when I find out I will post it here just for the heck of it. P.S. If I made a mistake in the key sequence list above I will post any corrections by the end of this week 10/30/92. good luck! Chris... Newsgroups: rec.radio.amateur.misc From: Lawrie.Brown@adfa.oz.au Subject: Re: Standard HT 528 receive mods (999MHz) Message-ID: <1992Nov3.061703.18332@sserve.cc.adfa.oz.au> Sender: news@sserve.cc.adfa.oz.au Organization: Australian Defence Force Academy, Canberra, Australia References: <92302.101309U27387@uicvm.uic.edu> Date: Tue, 3 Nov 1992 06:17:03 GMT Lines: 55 writes: >This simple key-in sequence will enable the Standard 528 twin band HT >to receive out of band signals up 999MHz. I too have a Standard C528 (as do quite a few of the other local amateurs here), and I'm very happy with it. In addition to the sequence you gave, there is also a (longer) sequence which enables wide-band transmit (how wide I don't know as I've no need to use it). There are also quite a few additional functions available off the keyboard from those documented. Appended below this is a table (which I keep as an Excel spreadsheet), listing the various functions in rather abbreviated form - I'd be very interested in learning about any others. Note the extra memory channels - there are actually 20 on each band, the upper 10 are accessed as shown below (accesed with a F+A prefix key, and displayed with a bar over the number). You can't use them in band scanning, but apart from that they function as normal memories. Cheers Lawrie Brown VK1KLB Standard C528 Keystroke Cheat-sheet Key\Seq key F+key Set,key Set,F+key ============================================================================= 0 0 Set / Scan mode Mute beep Set freq limits 1 1 PTT Lock # Pager beeps 2sec xbRPT delay 2 2 Dual Operation 1 kHz entry Tone scan stop 3 3 TX Power Pager TX delay UHF band switch 4 4 Freq lock Squelch mute 4 digit entry 5 5 Battery save Auto Power save Mute pager audio 6 6 Tuning step Rotary enable in FL 1MHz step 7 7 Tone coder on/off Set Tone freq DTMF single tone 8 8 Repeater mode Set Offset freq Crossband RPT 9 9 Reverse mode LAMP is REV 10MHz up/down * PS step DOWN Dial/Tone Scan DTMF Clone # SIFT step UP Memory freq shift Call Tone burst A CL Cancel B PAG Page on/off Page code set/show C MS MS.M Mem scan MS.M set/scan D V/M ENT Mem<->Dial Memory set VHF VHF main VHF only UHF UHF main UHF only LAMP Lamp on/off Lamp toggle SQL OFF Squelch off sub-band sql off ============================================================================= Other Key Sequences ============================================================================= Wideband RX: Reset, VHF, F+0, F+D, PTT, UHF, F+L, F+0, F+B, F+L, F+3, PTT Wideband TX: VHF, F+6, PTT, F+8, F+8, F+7, F+7, F+C, rotate down 1, " F+0, F+D, PTT, F+8, F+C, F+0, F+4 (F+0, F+3)*4 Set Upper 10 Memory channels: F+D, F+A, num ============================================================================= Newsgroups: rec.radio.amateur.misc From: wa2ise@cbnewsb.cb.att.com (robert.f.casey) Subject: C528 extended RX/TX and other keyboard mods file Message-ID: <1992Dec14.151833.9694@cbfsb.cb.att.com> Keywords: mods Sender: news@cbfsb.cb.att.com Organization: AT&T Date: Mon, 14 Dec 1992 15:18:33 GMT Lines: 186 received this on packet: Msg# TSF Size #Rd Date Time From MsgID To 30546 PY 4803 1 03-Dec 1626 G7IED 27645_GB7LAN WA2ISE () Sb: C528 Here is a little mods list. I find the 40ch mem a bit messy so I don't use it and you can get the phone tones by pressing the ptt and a number on the pad. Hope this is of help to you 73s Ralph V7 The 520/28 is very flexible capable of TX RX on 122.825 to 176.800MHz and 328.000 to 473.125MHz. And RX only on 820.225 to 972.500MHz. The following are not in the owners book. F=FUNC L=LIGHT ______________________________________ There are two ways to set Rx wide band if you press reset you will need this (A) 1 F + VHF 2 F + 0 3 F + D 4 RELEASE F 5 PRESS UHF 6 F + 0 7 F + D 8 F + L 9 F + B 10 F + 3 11 F + 0 12 F + 3 13 F + 0 14 F + 3 15 F + L TO CANCEL RESET? ______________________________________ (B) 1 F + 0 2 F + D 3 PTT ON 145.00MHz IS DISPLAYED 4 PRESS VHF 5 F + L 6 F + 0 7 F + B 8 F + L 9 F + 3 10 PTT ON 433.00MHz IS DISPLAYED TO CANCEL RESET? THE RX IS NOW WIDE BAND FOR TX CONTINUE BELOW ______________________________________ TX WIDE BAND PROCEDURE 1 VHF 2 F + 6 3 CHANGE FREQUENCY STEP FROM 10KHz TO 12.5KHz BY ROTARY SELECTOR 4 PTT ON 145.00MHz IS DISPLAYED 5 F + 8 6 F + 8 CONFIRM T AND + IN DISPLAY 7 F + 7 8 F + 7 9 F + C 10 SET 144.9875 BY ROTARY SELECTOR 11 CONFIRM THE SMALL 75 ON DISPLAY 12 F + 0 13 F + D 14 PTT ON 15 F + 8 16 F + C TO CANCEL RESET? _____________________________________ TO TOGGLE BETWEEN 3-400 AND 8-960 MHz 1 SET MAIN BAND TO UHF 2 F + 0 3 F + 3 ______________________________________ DIRECT 4 DIGIT KEY INPUT 1 F + 0 2 F + 4 DISPLAYS A . BETWEEN 2nd AND 3rd DIGIT TO CANCEL REPEAT ABOVE ______________________________________ 10 MHz SHIFT BY UP/DOWN KEYS 1 F + 0 2 F + 9 TO CANCEL REPEAT ABOVE ______________________________________ 40 CHANNALS MEMORY THERE ARE 2 MEMORY CHANNELS PER MEMORY NO ON VHF AND UHF. THEY CAN BE USED IN 2 WAYS. (A)TO PROVIDE PROGRAMBLE RX TX FREQUENCIES (B)TO DOUBLE THE SIMPLEX CHANNELS AVAILIDLE (A) 1 SELECT RX FREQ (VFO MODE) 2 F + D 3 PRESS MEMORY NO TO BE PROGRAMMED 4 D 5 SELECT TX FREQUENCY 6 F + D 7 F + THE MEMORY NO TO BE PROGRAMMED + - WILL APPEAR INDICATES THAT MEMORY CHANNEL IS IN SPLIT FREQUENCY MODE ONCE A MEMORY IS IN SPLIT MODE IT CANNOT BE CHANGED BACK TO A SINGLE MEMORY UNLESS ITS PROGRAMMED AS A EXTRA CHANNEL (SEE BELOW) OR RESET F + 9 WILL SWAPP RX AND TX (B) EXTEND TO 40 MEMORIES PROGRAM FIRST 10 MEMORIES IN EACH BAND TO PROGRAM ADDITIONAL 10 MEMORIES 1 SELECT FREQUENCY (VFO MODE) 2 F + D _ 3 F + A AN M WILL APPEAR 4 PRESS MEMORY NO TO BE PROGRAMMED TO RECALL EXTRA MEMORIES USE ROTARY CONTROL IN MEMORY MODE OR ENTER MEMORY MODE AND PRESS F + A THE M AND BAR APPEARS PRESSING 0 TO 9 WILL RECALL EX CHANNELS THE EX CHANNELS CAN HAVE REP SHIFT AND CTCSS TONES BUT VALUE WILL BE THE SAME FOR BOTH CHANNELS IN ONE MEMORY ______________________________________ DTMF CLONE COPYS YOUR SETTINGS TO ANOTHER 520/28 TUNE BOTH RADIOS TO SAME FREQUENCY 1 B P IS DISPLAYED 2 B C IS DISPLAYED 3 F + 0 4 F + PS 5 PTT ONLY ON THE RADIO THAT CONTAINS THE MEMORY DATA A SERIES OF TONES WILL BE HEARD FOR APPROX 2 MINUTES THE RADIO MEMORYS WILL NOW BE IDENTICAL ______________________________________ DTMF SINGLE TONE 1 F + 0 2 F + 7 TO CANCEL REPEAT ABOVE ______________________________________ MUTING THE AUDIO OUTPUT OF PAGER 1 F + 0 2 F + 5 TO CANCEL REPEAT ABOVE ______________________________________ TONE SQUELCH SCAN STOP 1 F + 0 2 F + 2 TO CANCEL REPEAT ABOVE ______________________________________ H.H.TRANSPONDER SUB BAND TO MAIN 1 F + 0 2 F + 8 A . APPEARS TOP RIGHT OF MEMORY NO TO CANCEL SET SUB BAND ON CLEAR FREQUENCY BY ROTARY SELECTOR AND PRESS UHF OR VHF _____________________________________ TOGGELS BETWEEN 100KHz AND 1MHz STEPS ON ROTARY SELECTOR WHEN FUNC IS PRESSED (FAST TUNING RATE) 1 F + 0 2 F + 6 _____________________________________ SET FREQUENCY LIMIT ON EACH BAND 1 F + 0 2 F + 0 ______________________________________ SET TX HANG DURING TRANAPONDER FUNC 1 F + 0 2 F + 1 ______________________________________ Be very carfull with the h.h.transponder and wide band tx func. 73s Ralph G7IED @ GB7FCI ============================================================================== Note: I haven't tried or verified this, proceed at your own risk. And do not transmit outside of legal bands! WA2ISE ллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллл