Quote:
Originally Posted by madlabs
Finally where the set it. Now when I power up I get nothing.
Swapped out V8, V10, V11, V12, V13. No change. The horizontal output tube looks like it might be red-plating a little but I am not sure. It is just a dim orange.
Voltage at the rectifiers is a little low, 247 instead of 290. I couldn't find my HV probe before I came over to where the set is. How did I misplace something 12" long with a cord on it? I dunno. Anyway, I measured the flyback resistances and all are exactly as they were when I restored the set.
What do do next? I guess start trying to track down the low B+ voltage. I think I have a test socket I can put on the horizontal output tube and do some looking at the voltages there.
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The low B+ could be from the horizonal output tube red plating and loading the B+ down. I would re-measure the voltage at the rectifiers with the horizontal output tube removed. I'm assuming this is a series string set with 2 rectifiers in a voltage doubler circuit?
Any chance you can post up the schematic?