Chinese uSDR/uSDX Clone

There are many variants of transceivers labeled as or related to “uSDX”. These radios use different connections. For some of them there are store cables [1, 2], for others there are no pre-made cables available in store at this time.

The radios in the pictures below will need homebrew cables:

uSDR Clone Manual.pdf (378.0 KB)


uSDRplus_red_corners.pdf (223.6 KB)

According to the information in the manuals the pinout for the mic connector looks like this:


Would love to hear the logic behind the decision to use ring 1 for ground connection. Anyway, based on this pinout the audio cable to Digirig will look like this:

3.5mm TRRS tip (MIC) → 3.5mm TRRS ring 1 (RIG_AFIN)
3.5mm TRRS ring 1 (GND) → 3.5mm TRRS sleeve (GND)
3.5mm TRRS ring 2 (PTT) → 3.5mm TRRS ring 2 (RIG_PTT)
3.5mm TRRS sleeve (SPK) → 3.5mm TRRS tip (RIG_AFOUT)

Please report your results if you end up building the cable.

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