Assembled my QMX+ and it's working.? I had a couple of issues related to enameled wire not making good connections that were resolved.? I know it's working, I've made contacts on several bands successfully, including some decent DX, all on FT8.
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What bothers me is that the output power seems to jump around wildly.? If I go to the diagnostics screen and key the transmitter, the Bias SMPS shows fluctuations in current that correspond to the fluctuations in the output power.? The Duty cycle on the Bias SMPS always shows 0%, even as the current jumps around in the red.
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I suspect I've managed to damage one (or more) of the surface mount semiconductors.? At least that's what my reading on the subject would seem to suggest.? What I need is a test that can be done with a multi-meter that would shed some light on the problem.? I can probably resurrect an oscilloscope if I need it, but I'm hoping someone can lead me to a simple voltage or resistance test that could help isolate the problem.
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My last problem was related to soldering and enameled wire which was easily resolved.? I'm hoping this issue can be resolved without major surgery as well.
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Thanks in advance for all of the good advice I'm about to receive.
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Andy
WB9YXA
