Yaesu / Vertex VX and FT series Handheld Microphone / Speaker Mic pinout

4 pin 3.5mm (2.5mm) plug connector layout
4 pin 3.5mm (2.5mm) plug connector

Yaesu / Vertex HT Microphone/SP Cable Pinouts

The VX-6R/E, VX-7R/E,VX-8R/E, VX-8DR, VX-120, VX-127, VX-170, VX-177
and all models that include the CT-91 adapter in their accessory list
use a threaded, waterproof version of the same 3.5mm plug 

Pinouts for both, starting from the tip, are as follows:

Pin Function
2 Cloning
3 Speaker

Pin 2 is the clone RX/TX pin. Not used except in programming the Radio.

Speaker/mic cable for the Yaesu VX-170, VX-6R, VX-7R, VX-120 and
others. This cable has the unusual and hard-to-find threaded 3.5mm
4-conductor connector with o-ring.


You should check that the connections match your particular radio.
Connections used only for cloning or programming are usually NOT present
in these cables.


Handhelds using the 3.5mm/2.5mm 2 prong connector including the FT-411,
FT-470 , FT-530, FT-51R, FT-11R, FT-41R, FT-23R, FT-203R, FT-416,
FT-703R, FT-109R, FT-109RH, FT-209R, FT-209RH, FT-709R, FT-709RH,

Pin Function
3.5 Ring Ground
3.5 Tip Rx audio
2.5 Ring Ground
2.5 Tip Mic Audio


Handheld models including the FT-10R, FT-40R, FT-50R, FT-60R, VX-1R,
VX-2R, VX-3R, VX-5R, VX-110, VX-150, and any other model including the
CT-44 adapter and MH34b4b speaker microphone in their accessory list
utilize the non-threaded 4 conductor 3.5mm type microphone plug

Pinouts for speaker and mic are reversed on the vx-3r

None found.