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I read that thread and am impressed. One technical point to make here. The 5R4 rectifier tubes that you say don't seem to light, well in my experience they seldom show much glow. Pretend they light and you'll find they probably work fine.
My Dressen-Barnes is a very similar unit and it could be up for sale here in Los Angeles. It has two separately adjustable outputs and works well. 0-300 and 0-500 Volts, perfect for nearly any tube project. Two meters, volts and mA, plus 10A at variable 6.3V. Only major defect is a crack in one of the meter glasses. And I have a manual.
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