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Old 03-01-2012, 10:37 AM
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DaveInDenver DaveInDenver is offline
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Join Date: Jun 2006
Location: Larimer County
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Originally Posted by nakman View Post
I learned today from Motocomm that FGL-559 would be the correct system for your Yaesu VX-7R. The VX-3R would be the FGL-558 system. the difference is the plug that goes into the radio, one is waterproof for the VX-7, the other not so much. I went ahead and ordered the kit, with the plug for each HT... will do a little documenting once it all gets here.
The connector for the VX-1/2/5 has the same pin out as the VX-6 and VX-7, although the connectors are slightly different. The VX-7 has a screw-in base that retains the waterproofing which means its body is narrower. If you use an accessory designed for the VX-5, for example, you have to shave the connector body to make sure it sits down far enough into the VX-7 connector, otherwise the plug does not insert far enough and you can short VCC to the shield or mic.

I personally cut off the VX-5 type connector and solder on the correct one, you can get them from Mouser and other places, both with and without a pigtail. It's also possible to use 4-conductor phone connectors with molded bodies designed for iPhones.

FWIW, I didn't dink with the PTT and just used VOX on the VX-7, which is why ambient wind noise is a major concern for me.

Kobiconn 4-conductor 3.5mm plug:

Kobiconn with molded pigtail:

Argent's raw cables (slightly cheaper than buying a CT-91 to cut up):

4 pin:
Tip: Speaker
Ring1: Data/VCC
Ring2: Mic/PTT
Sleeve: GND

Tip - Mic/PTT
Ring - Data
Sleeve - GND

Tip - Speaker
Ring - NC
Sleeve - GND
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