Cable for BTECH UV-25

3.5mm TRRS headset socket in the back has all required signals:


Digirig TRRS to TRRS audio cable will look like this:

BT tip (PTT) → DR ring 2 (PTT)
BT ring 1 (MIC) → DR ring 1 (RIG_AFIN)
BT ring 2 (SP) → DR tip (RIG_AFOUT)
BT sleeve (GND) → DR sleeve (GND)

Manual (1.1 MB)

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Worked for me BTech UV-25X4


I have a UV-25x4 radio and when I connect the TRRS audio cable from the headset to the audio in on the Digirig. The radio starts transmitting. The Digirig is connected to the computer and the port is set up. I have also used this same Digirig on the UV-5R radio and it works fine. Any suggestions to get this working would be appreciated. I did also jumper from the GND to the PTT on the TRRS cable when it was connected to the radio and it did start to transmit like it should.
Thanks for any help you can give.

I did some for testing and found the UV-25x4 radio transmits when I also jumper from the GND to the PTT. It will also transmit when I jumper from SP to GND. I think this indicates I have an internal problem with my radio.

It’s quite common in radios to share the line between MIC and PTT, but I would agree that SP and PTT is an unusual combination.

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