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1953 Philco 53-T1886 Code 125 AM/FM/Phono/TV Combo
#17

Quote:Are these capacitors in voltage doubler circuits? Let's say you need 8mfd at 1000 volts. You can put two 16mfd 500 volt caps in series to get it. The capacitance is halved and the voltage is doubled. You can't get something for nothing.
I have no idea where these capacitors are in the TV's circuit or what purpose they serve as I just saw them in the Capacitor Parts Listing in the Sam's Photofact for the TV, I really didn't take a look at the schematics to see where those capacitors were in the Circuit and what purpose they were serving. 
I unfortunately have a physical copy of the Sam's Photofact for this TV so I don't really have any way to upload the schematics on here very easily because I don't have a scanner that's big enough to scan the schematics page into the computer, and trying to use the camera on my phone wouldn't work very well because it wouldn't be able to blow the schematics up large enough to be readable on the computer screen without distorting them.

How would I tell if the capacitors I had mentioned were in a voltage doubler type circuit or if it was just being used to filter the high voltage circuits?

UPDATE: I looked at the schematics and looked up those capacitors on the schematics and they were actually High Voltage Ceramic Disc Capacitors, and from what I saw in the parts list vs. the schematics for those capacitors is that the way they marked those capacitors in the parts list compared to the rest of the mica or ceramic disc capacitors is that the majority of the ceramic disc and mica capacitors in the parts list didn't have a voltage listed with the capacitance value, but then there was a few ceramic disc capacitors that were listed with a voltage value on the parts list which made me think they were electrolytic capacitors because they listed the capacitance values in whole numbers rather than decimal values like the paper capacitors were which are listed with a voltage value and electrolytic capacitors are usually listed with a whole number value and a voltage value which is why those capacitors in the parts list threw me for a loop.

So it turns out I have a lot less capacitors to order than I thought I did initially, according to my parts list count I have 41 film capacitors I will need to order to replace these old Bumblebee paper capacitors with, and 11 electrolytic capacitors for a grand total of 52 capacitors all together.


Messages In This Thread
462ron - by 462ron - 12-05-2025, 10:00 AM
462ron - by 462ron - 12-21-2025, 09:19 AM
RE: 1953 Philco 53-T1886 Code 125 AM/FM/Phono/TV Combo - by captainclock1988 - 03-07-2026, 01:31 AM



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