Cable for Wouxun KG-XS20H

21

I don’t assume you own an oscilloscope. You can use your computer’s soundcard to probe the radio for audio input/output. This is quite hacky so “there be dragons” disclaimer if you want me to outline the experiments.

22

No problem, I can try. I will follow your instructions!
But first, should I check the connections of the spots and header in microphone? Right?

Greetings, Hynek

23

Hello K0TX,

I wish you all the best in 2026!

I have finally done my homework :slightly_smiling_face:
I tested the connections of the suggested pins to the connector.

First, I tested the microphone connections using continuity and resistance measurements.

  • Mic− is connected to pin 7 on the connector (GND).
  • Mic+ is not directly connected to any pin. I measured the resistance from mic+ to the following pins:
    • Pin 1: 1.2 kΩ
    • Pin 2: 25 kΩ
    • Pin 6: 3.66 kΩ
    • Other pins show no connection to mic+.

The resistance measured between mic+ and mic− is 0.93 kΩ.

mike_connections
mike_connections582×500 62.5 KB

The PTT button is connected to pin 3 on the connector, with a resistance of 10.66 kΩ.

ptt_connections
ptt_connections505×402 40 KB

I hope this information makes sense and is useful.

73,
Hynek, 9A3CRX

P.S. I was also wondering whether I could use the Digirig with my HT. If I buy a Digirig with cables for my HT (Yaesu FT-65E), could I use it to identify the connections of my Wouxun radio and then use the Digirig with that radio as well?

24

Thank you for the info. With GND and PTT identified you can test that functionality.

We got no conclusive results from our continuity tests, but we can still find audio lines by probing them with the Digirig. For good measure I would add about 1K resistor in series while doing that.

When you have your Digirig - connect the ground line, turn off the squelch on the radio and probe the mic wires with one that leads to tip connector on the Digirig side (RIG_AFOUT). Look for audio coming by patching Digirig’s recording device to computer’s speaker using “listen” checkbox.

For the reverse direction you can use any web-based tone generator to get the audio output from the Digirig, key up the radio, probe the pins with the line connected to ring 1 on Digirig’s end (RIG_AFIN). When successful, you should hear the tone on another radio tuned to the same frequency.