Hello Ludwig and Hans,
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because I have planed a SOTA activation and my power supply has no current limit, I didn't want to risk with the check before that. Nothing was visible damaged or burned.
After my successful SOTA activation (there I suddenly met another OM, he had also a QMX :-),
I have tested it now - and, YESSS, it was D105!!!
Because I had no other SMD part, I took a "normal" 1N4148, there was enough space to bend and solder it comfortably.
Now, everything is working perfectly down to 7V.
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Ludwig, thank you for your support and explanation of the function principle, this was very instructive and inspiring.?Hans, thank you for your brilliant construction of QMX and your support.
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73 es CUAGN de Stojan, DK4SR
