Hi Bert
I have pulled a lead on both the C582 (2.2 mF) and the C584 (2.0 mF) caps in the 95V circuit. Both are +50% -10% Spec. The C582 read 2.40 mF Good would be between 3.3 mF and 1.98 mF. The C584 read 2.46mF. Good would be between 3.0 mF and 1.8 mF. So I considered these good and reinstalled the lead. I can not seem to find a new or used U550 anywhere so I was thinking of constructing one. Unfortunately on the schematic I have I don't see values for the diodes or any spec information on the 3X multiplier. Plus I am not sure if it is good, i.e. safe and wise to construct a HV module.
So for right now I am at a loss on what else I can try or test and/or determine a good way to determine if the U550 module is good or bad.
Harrison N1FAM
