Highfields Amateur Radio Club
Constructors Corner.

Vertex Standard / Yaesu Microphone Pin Outs.
For: FT-90, FT-100D (1990s), FT-2600, FT-3000, FT-7100,
FT-8100.

The numbering of the pins as I show them may be different from the manufacturers numbering.

Important:
Never ground pin 4 or damage to the regulator will occur.

NOTE:

FT-90: 9600 bps packet on pin 5. Also Cloning (see: Making Yaesu Cloning Cables page for details)
FT-2600: Cloning on pin 5. (see: Making Yaesu Cloning Cables page for details)
FT-3000: Audio Out on pin 5.
Other models: No Connection on pin 5.

6 Pin modular Pin Signal
connector 1 SW1 (multi function switching)
2 Mic Audio
3 Common Ground
4 +9v
5 (see note)
6 SW2 (multi function switching)

Schematic of MH36 (the supplied Mic) for SW1 and SW2 functions: