Highfields Amateur Radio Club
Constructors Corner.
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copyright date

Vertex Standard / Yaesu Microphone Pin Outs.
For: FT-857.

Thanks to K6XX for the additional Menu 059 pin out data.

Important:
Keep Mic Ground and PTT Ground separate.
Never ground pin 3 or damage to the regulator will occur.

With Menu 059
(MIC SEL)
set to "NOR"
With Menu 059
(MIC SEL)
set to "CAT"
8 pin Modular Pin Signal
connector 1Down TX Data
2Up RX Data
3+5v
4Mic Ground
5Mic Audio
6PTT
(connect to pin 7 for TX)
7Ground
(PTT and other functions)
8Fast Power Switch


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