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
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: <wa2iseC69xqL.3xs@netcom.com>
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
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
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
From: 72277.550@CompuServe.COM (Bob Ross)
Newsgroups: rec.radio.amateur.packet
Subject: MFJ - ALINCO & 9600
Date: 1 Feb 93 04:32:22 GMT
Organization: UCSD Usenet Gateway
Lines: 32
Message-ID: <930201043222_72277.550_DHJ69-1@CompuServe.COM>
NNTP-Posting-Host: ucsd.edu
Originator: daemon@ucsd.edu

Hello Angelo...

>> I am using the MFj-1270B with the MFJ G3RUH modem with my Alinco 1200 data
>>radio to connect to a Cluster high speed backbone network.. It works great
>>for me.. I am wondering the mod that Alinco suggested to you?? There were
>>several of them. 


The Mod was as follows:


                                 TRANSMITTER
1.  Remove R-31
2.  Remove C-40 (save this part, it is to be reused!)
3.  Connect one leg of C-40 to PIN 7 of the VCO Board
4.  Connect a jumper from the free leg of C-40 to the HOT end of C-35
              The MIC input is now connected DIRECTLY to the VCO!

                                   RECEIVER

1.  Disconnect the PINK wire connected to the MIC connector and the PC Board
    from the PC Board
2.  Reconnect the PINK wire to PIN 2 on the IF Board connector
         This eliminates the low pass filtering on the discriminator!


I am real happy to hear that at least one mfj & alinco works..  Is this the mod
you used???


Thanks Bob Ross n2oml
internet  -  72277.550@compuserve.com


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
