Connecting Vertex/Yaesu VX-146 to Autocom

Posted on 2007-08-08 08:09:16 EEST.

I recently got a new VX-146 radio and needed to get it working with my Autocom unit

  1. Get a proper connector lead, I stronly suggest getting one mean with this radio with (thumb)screw locking, the connector is "standard" 4-pole 3.5mm jack but on the radio end it's recessed a bit so if using generic part you may need to use destructive editing to make it fit properly (and unless you hot-glue it to place water will leak inside you precious radio since it doesn't seal properly).
  2. Get 5-pole 60° DIN connector (references to positions on this will be on the solder side).
  3. Get 1-2k resistor, small enough to fit inside your DIN connector housing
  4. Establish which lead corresponds to which pole, I use pole numbers counting from the tip towards base, so pinout is as follows: tip is pole #1 and base is pole #4. The signals are as follows: #4 is shield/ground, #1 is speaker and #3 is mic.
  5. Solder ground signal (#4) to 12:00
  6. Solder speaker signal (#1) to 14:00 (the Autocom provided cable [at least for Kenwood TK31xx radios] has a small capacitator here to filter DC, not actually needed here or there)
  7. Solder mic signal (#3) to 10:00
  8. Solder the resistor across 10:00 and 16:00
  9. Test and if you realize you read the DIN clock incorrectly, reverse connections accordingly

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