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Well, there are a couple of good reasons for the B+ portion of the ballast being dead in my set. C39 looks like it's spewed it's electrolyte. They also replaced the selenium rectifiers with 1N804 diodes. These only have a PIV of 200 volts and this doubling circuit is on the ragged edge of making them break down. I haven't checked them yet.
I'm curious about the symbol in the schematic though. It appears that they have the arrows pointing in the wrong direction. Is the symbol different for Selenium rectifiers?
John Y.
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11-23-2008, 10:30 PM
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