I have a Philco 38-60 that I got and posted earlier and was told to trade out the old capacitors to new..... Ok I will be fine I hope in soldering in new ones but the problem that Radio Shack can't seem to help me with is how to convert the mfds to ufs???? I thought they might be a little help but were none at all. I have the big capacitor which is a 16mfds at 450 dc volts and then a smaller one that is 8mfds at 450 dc volts bother are electrolytic capacitors. the I have the paper ones that say 1 mfds and the philco stock numbers of 30-4455s one 30-4317 p a 30-4412 p and a 30 4358 p. I would like to know which ones to replace these with but would also like the rule of thumb of how to convert for the next radio I get how to do it without asking help. Thanks for any help Shawn
mfd = mF = uF
mmfd = pfd = pF
Use paper capacitors rated at either 600 or 630 VDC, this will cover just about every antique radio need.
Usually, electrolytic capacitors should be rated at 450 WVDC. Occasionally, you may need a 500 WVDC unit but this will be the exception rather than the rule. Also, some Philco models used a 10 uF low voltage electrolytic in the B- supply of the set;
these should have their positive ends connected to ground and should be rated at 50 WVDC.
If in doubt, please feel free to ask
Edit: I seriously doubt you will find any help at Radio Shack. As someone over on the
Antique Radio Forum has said previously, "Radio Shack. You've got questions, we've got blank stares."
Thanks again for the help!! I found that post but was hoping maybe someone to go the extra mile and try in make a phone call to someone that might. I just got that big "deer in the headlight look from the clerk and the manager! Not a soul in the whole store wasn't like they were pressed for time. oh well. Thanks again Shawn
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My local Rat Shack hasn't carried capacitors suitable for old radios for many years.
A lot of the guys buy their capacitors from Just Radios:
http://justradios.com/
I buy mine from Mouser:
http://mouser.com/
I get most of my parts from Allied Electronics...
I generally buy capacitors from Bob's Antique Radios:
http://www.radioantiques.com/
I like Mouser, but try to support Bob as often as I can because his business is a small proprietorship deserving of our support. Besides, Bob is a nice guy as well.
Great Resources!! Thanks for the info guys