Whilst I'm waiting for my QMX+ to arrive I thought I'd try and fault find my QMX. I believe my problem stems from the multi-layer board and poor quality soldering iron.
So... I've got a new Hankko station. With the multi-layer pcb I think I've struggled to get enough heat into some of the joints.
Having spent a lot of time on the QCX+ QDX and QMX schematics and with the very informative posts here, I think I have a good idea of how everything works. One thing I'm missing is how TONE is generated on transmit. Is it generated in sdr and can the presence of keydown tone in the headphones indicate a workingPCM1804?
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Thanks.
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Phill EA5JHA
Phill