CONNECTING 2 RADIOS TO ULI CONTROLLER

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 2 RADIOS, 20 AMP SUPPLY, ULI and 2 RADIO CONTROLLER. Running 25 watts 2 meters 15 watts 70cm
   I ADDED SWITCHES NOT SHOWN IN SCHEMATIC

  RADIO SHACK RS242 2 METER RIG shows connection point
  for COS, RS202 is 2 pins down on same connector as 242.      Check with a volt meter.Wire is away from TX section.
  ADDING A FAN THERMOSTAT TEMP ON 124 DF
   Mod for ADI rigs others will be similar wiring.
   To find COS point use a voltmeter and test the second solder pad on board. Voltage should be 4.5 to 5 volts+. Now transmit into the radio and voltage should drop.
     Buy an extra microphone connector and connect to #2 and # 8 for PTT transmitter keying.Use shielded wire for microphone audio #1  and #7 ground.  These are connected to controller and I use mini phone plugs.

     * I hate vox and COS is the only way for me.  

Download PDF schematic