Hello and apologies to use this mailing list to ask an off-topic, but I think that probably someone among the many hams here, could provide me some suggestions to attempt a solution.
The problem is that, after last usage of my pretty old YAESU FT-100, using malfunctioning switching power supply (unstable output voltage) during some QSO on FT8, I noticed that now my rig is transmitting with just half of its nominal power: 50W instead of 100W. The good news, at least for my understanding, is that this issue occurs only on some HF bands and not on all of these. For example on 20 and 17 meters, the output power is the expected. I suspect that a possible section to be verified could be the low pass filter, between the PA and the output antenna connector. I would be very grateful to receive some technical opinion regarding this matter. Thanks for your kindest attention and once again my apologies to write about this here. Regards, PY1ZRJ Marco Inviato da Outlook per Android<https://aka.ms/AAb9ysg>
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