From njitgw.njit.edu!rutgers!att!cbfsb!cbnewsb.cb.att.com!wa2ise Tue Jun 23 15:37:08 EDT 1992 Article: 3224 of rec.radio.amateur.packet Path: njitgw.njit.edu!rutgers!att!cbfsb!cbnewsb.cb.att.com!wa2ise From: wa2ise@cbnewsb.cb.att.com (robert.f.casey) Newsgroups: rec.radio.amateur.packet Subject: DR1200 mods for 9600 baud Keywords: mod file Message-ID: <1992Jun21.220049.22791@cbfsb.cb.att.com> Date: 21 Jun 92 22:00:49 GMT Sender: news@cbfsb.cb.att.com Organization: AT&T Lines: 26 copied from packet: Msg# TSF Size #Rd Date Time From MsgID To 13406 BF 1319 1 10-Jun 0200 KB6ZBI 22178_KB6ZBI ALL@USBBS () Sb: DR-1200/9600 MOD Alinco mods to use mic connector for 9600 baud data TRANSMITTER Remove R31 Remove C40 and replace with one end free and other end reconnected to pin 7 of the VCO board. Connect a jumper between the now free end of C40 and the hot end of C35. The Mic input is now connected directly to the VCO. RECEIVER Disconnect the pink wire that goes to data output on the mic connector from the PCB and reconnect it to pin 2 of the IF board connector. This eliminates the low pass filtering on the discriminator. Jon KB6ZBI (Info from Alinco) Note: I haven't tried or verified this, proceed at your own risk. WA2ISE ======================================================================== Newsgroups: rec.radio.amateur.misc Path: elroy.jpl.nasa.gov!decwrl!csus.edu!netcom.com!wa2ise From: wa2ise@netcom.com (Robert Casey) Subject: DR1200 InterMOD reduction mod file Message-ID: Keywords: intermod Organization: NETCOM On-line Communication Services (408 241-9760 guest) Date: Fri, 30 Apr 1993 02:03:57 GMT Lines: 40 copied from packet: Msg# TSF Size Date Time Arrived #Rd Seq # Msg ID Route 612 BF 2607 21-Apr 1643z 24-Apr 0 (002799 - 28806_W0LJF ) [] K0ZL ==> MODS@USBBS "DR-1200 INTERMOD REDUCED" ALINCO DR-1200 INTERMOD REDUCTION CAUTION: THE FOLLOWING PROCEDURE INVOLVES DESOLDERING SMD (SURFACE MOUNT DEVICES). IF YOU ARE NOT QUALIFIED TO WORK ON SMD DEVICES OR DO NOT HAVE THE PROPER EQUIPMENT, DO NOT ATTEMPT THIS MOD! SEEK PROFESSIONAL TECHNICAL ASSISTANCE. THE ORIGINATOR OF THIS MODIFICATION IS NOT RESPONSIBLE FOR ANY LOSS INVOLVING THE PERFORMANCE OF THIS MODIFICATION. CAUTION: THIS RADIO EMPLOYS STATIC SENSITIVE DEVICES. SUITABLE MEANS SHOULD BE EMPLOYED TO ASSURE A STATIC-FREE ENVIRONMENT PRIOR TO BEGINNING WORK ON THIS RADIO. 1. REMOVE POWER AND ANTENNA FROM RIG 2. REMOVE BOTTOM COVER 3. LOCATE C-19, LEFT SIDE FRONT OF BOARD (CLEARLY LABELED, NEAR Q3). 4. REMOVE C-19: SUCK UP THE SOLDER AND CAREFULLY PRY AWAY FROM BOARD WHILE STILL WARM. 5. SAVE THE CAPACITOR IN CASE YOU GOT THE WRONG PART! 6. REASSEMBLE THE RADIO, NO RETUNING NECESSARY. This capacitor connects D1 (back to back diodes) to the first IF line. D1 is supposed to be a "limiter". Unknown why Alinco chose to put in such a limiter, as the integrated IF chip IC-1, an MC3357, has a built- in limiter. Also, the Kenwood TM-231 which uses nearly the same layout and circuit, doesn't have such a ciruit. While the intermod hasn't gone away entirely (I'm not done with it yet!), it has diminished enough to make the rig usable on packet AND voice now. 73 de Bill, K0ZL@W0LJF.#NECO.CO.NOAM Note: I haven't tried or verified this. proceed at your own risk. WA2ISE =============================================================================== Msg Nr. : 49350 Da : IW3GRX Per : MOD Tipo/status : PN Data/ora : 0521/2123 Dimensione : 2526 Titolo : Alcune modifiche per il DR1200 Bid (Mid) : 4331_IW3GRW ллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллл Newsgroups: rec.radio.amateur.misc From: wa2ise@cbnewsb.cb.att.com (robert.f.casey) Subject: Alinco DR1200t full band mod file Message-ID: <1992Oct4.161109.13943@cbfsb.cb.att.com> Keywords: mods Sender: news@cbfsb.cb.att.com Organization: AT&T Date: Sun, 4 Oct 1992 16:11:09 GMT Lines: 30 copied from packet: Msg# TSF Size #Rd Date Time Arrived Seq # Msg ID Route 1020 BF 1405 0 22-Sep 2223z 29-Sep (033727 - 26390_KB2NEX) [] N2ROC ==> ALL@USBBS "ALINCO FULL BAND MODIFICATION" Alinco DR1200T Full Band Modification Step 1. Remove 2 screws located on top of cover. Step 2. Loosen the 4 screws on both sides of top cover (do not remove). Step 3. Remove top cover Step 4. Locate Yellow wire Loop behind tuning Knob (this wire loops from the control board mounted on front pannel). Step 5. Cut loop and tape ends. Step 6. Replace top cover. Step 7. Reset radio (press 'F' and VCO/M keys together. While holding down keys turn off and on Power). Factory settings will be restored however the new frequency range will be from 132 to 173 MHz. Any memory will have to be reprogramed. These insructions are from Alinco, I've done them to my set and it works great. *** END OF MSG # 26320 from N2ROC @ KB2NEX.#NYC.NY.USA.NA ========================================================================= Note: I haven't tried or verified this, proceed at your own risk. WA2ISE ------------------------------------------------------------------------- Newsgroups: rec.radio.amateur.misc From: kd1hz@anomaly.sbs.risc.net (Michael P. Deignan) Subject: Re: Alinco DR1200t full band mod file Organization: The Rhode Island Internet Systems Cooperative Network Date: Sun, 04 Oct 1992 20:03:05 GMT Message-ID: <1992Oct04.200305.9906@anomaly.sbs.risc.net> References: <1992Oct4.161109.13943@cbfsb.cb.att.com> Keywords: mods Lines: 18 wa2ise@cbnewsb.cb.att.com (robert.f.casey) writes: > Alinco DR1200T Full Band Modification This modification also works on the DR112 and DR110 radios. Frequency range when applied: 130.000 - 169.995 340.000 - 379.995 870.000 - 889.995 MD ллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллллл