I plugged my Heil Pro 7 (IC) with AD-1-IC into my QMX+ with version 1_01_003 Firmware. I adjusted the mic gain with the hardware test from my PC and later from the QMX. I made my first contact with a POTA station in Houston from Colorado on 20m, with difficulty because of my weak signal. Although I have tried, I have yet to make any additional contacts on 20m.
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I plugged the Ad-1 stereo earphone connector directly into the QMX, but had to use a stereo splitter to isolate the ring and ground connections. While the ICOM radios like the 7610 supplies an 8 volt bias and the QMX 3.3 volt bias, the Pro 7 IC seems to work OK with the QMX. I use VOX.
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Using a Li-ion battery to power the QMX, I plan to drive over to a ham buddy who knows my voice and make further audio adjustments and check the transmitted signal quality. ?I will post my settings here after doing so.
