Quote:
Originally Posted by Kamakiri
Still the same heater voltage, and I'm all sorts of confused. I'll pull the 5U4 and power it up again and see what I see.
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I don't think, that model uses a 5U4. Selenium rectifier, voltage doubler. It uses a small heater transformer for most of the tubes. The sweep tubes and a few others are in series across the line.
