OK... I destroyed C202 and had to replace it with one on hand, but I was able to attach it vertically so that it made contact with the voltage doubler side alone, and with a tiny wire, I connected its input to the RF output of the output transformer.? ?So the HV supply should now be working.? ?(I did not test that but all the connections were holding via solder)
I then carried out the exact same ttests with commercial pads and attenuators and measured the output.? ?It is within a db or two of what I measured with just the FILTER in line.? ?So there was indeed a TINY bit of potential degradation, but it sure isn't much.? ? The horrible harmonics are NOT coming from the HV voltage doubler at least not on 15 meters....? ?That is very good news.? ?See the photos below.
This leaves I think three main other possibilities
a)? production by the input switching diode
b) leakage through other filters or around somehow
c)? production by the output switching diode
Gordon KX4Z
