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Philco 38-690 electrolytic capacitors--UPDATE
#20

Thanks for all the encouragement. I'm slowly working through the power supply. I've found the electrolytics to be quite leaky (even the replacements) and a couple of the originals close to being open. Funny, when I initially slowly powered up the set I only got a low hum from the main speaker, not a loud hum you might expect from bad electrolytics. I checked a couple of the paper caps so far and they seem to be pretty leaky too (using a Sprague TO-6A to check insulation resistance). After I get the power supply recapped I may try to power the set up slowly again to see if I get anything like reception.
So far no show stoppers in the power supply like a bad power transformer, open chokes (although one is a replacement) or transformers. I'm cautiously optimistic.


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RE: Philco 38-690 electrolytic capacitors - by retiredinprescott - 02-22-2014, 09:49 PM



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