DR1200

                  ALINCO DR-1200 CONSTANT TNC RX AUDIO MOD

Pin 6 on the DR-1200 is connected to the speaker audio lead inside the rig
to allow you to use a single cable to connect your TNC.  The problem with
this is that you have to leave the audio level up a little for the TNC to 
decode properly.  Most people can only stand so much packet racket!  Here's
a solution:

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 MESSAGE
         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 THE DR-1200
2. REMOVE BOTH TOP AND BOTTOM COVERS
3. REMOVE VOL, SQ, AND VFO KNOBS
4. REMOVE VFO AND MIC PLUG NUTS.  USE NEEDLE NOSE AS SPANNER, CAREFUL
   NOT TO DAMAGE CONNECTOR THREADS.
4. CAREFULLY REMOVE THE FRONT PLASTIC COVER.  SOME PRYING NECESSARY, 
   DON'T BREAK IT!  THERE ARE FOUR TANGS TO GENTLY PRY LOOSE, TWO ON 
   THE TOP, TWO ON THE BOTTOM.
5. REMOVE THE THREE SMALL PHILLIPS SCREWS HOLDING THE CONTROL BOARD TO
   THE CHASSIS.  GENTLY SWING CONTROL BOARD UP TO EXPOSE THE BACK OF 
   THE BOARD.
6. LOCATE THE PINK WIRE CONNECTING PIN 6 OF THE MIC JACK ON THE CONTROL
   UNIT TO THE UNDERSIDE OF THE MAIN BOARD.  DESOLDER THE PINK WIRE FROM
   THE >MAIN< BOARD END AND RESOLDER THAT END OF THE PINK WIRE TO THE 
   "HOT" SIDE OF THE VOLUME CONTROL.  IDENTIFY THE VOLUME CONTROL BY 
   LOOKING AT THE FRONT PANEL THAT YOU HAVE REMOVED.  THE HOT SIDE IS
   THE TERMINAL ON THE VOLUME CONTROL (THERE ARE THREE) THAT IS CLOSEST
   TO THE CPU CHIP.
7. REASSEMBLE THE RADIO.

NOTES: Some TNCS have a low input impeHE TERMINAL ON THE VOLUME CONTROL (THERE ARE THREE) THAT IS CLOSEST
   TO THE CPU CHIP.
7. REASSEMBLE THE RADIO.


CONTINUED IN DR1200.2