Sorry that I have not followed this thread closely. The photos are nice! I
see a LOT of work went into that. The bridge rectifier discussion reminded
me of an AM broadcast transmitter I built as a kit (the Bauer 707) in the
early 1970s. The high voltage transformer drove a full wave bridge
rectifier to develop 3 kV. The negative output of the bridge was grounded.
The center tap of the transformer provided 1.5 kV. The final amplifier ran
on 3 kV during the day for 1 kW output. At night, it was switched to the
center tap to get 250 W output. I always thought use of the center tap was
clever. But before that, I had often used a diode bridge with the
transformer center tap grounded to get a bipolar supply. This was the same
thing but with a different point grounded.

Harold



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