02-20-2014, 07:56 PM
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
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
