03-15-2015, 09:08 AM
[quote pid='60118' dateline='1392944190']
Most of those caps are rated at 475V. My 38-690 has all the original caps and I don't recall any marked 450. A few are marked 500; I will go into the basement later and get the specs for each.
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Most of those caps are rated at 475V. My 38-690 has all the original caps and I don't recall any marked 450. A few are marked 500; I will go into the basement later and get the specs for each.
[/quote]
(02-20-2014, 07:56 PM)retiredinprescott Wrote: [ -> ]I recently obtained a 38-690. Something must have happened during shipment (it was well packed) because the set is now "non playing" with only a low hum coming from the main speaker. Set was playing before it was shipped I was told.
I'm starting with the power supply and will rebuild that and check it with audio input.
A number of electrolytic caps have been replaced at some point with large 600V units (not checked yet). I have the original Philco parts numbers for the caps that should be there but I can't find a cross reference to the working voltage of the original caps. Would they have been higher than 450V?? Parts numbers are as follows:
30-2200 (18uF)
30-2025 (three of these 8uF)
30-2249 (multi section)
30-2201 (8uF, 10 uF)
The Philco parts list and schematic shows the capacitance values but no voltage values.
This is going to be a long slog. The power supply doesn't look too bad but that chassis is really intimidating..
Thanks, Mark