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capacitors?????????? - Printable Version

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capacitors?????????? - Guest - 10-26-2009

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

Re: capacitors?????????? - Ron Ramirez - 10-26-2009

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 Icon_smile

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." Icon_rolleyes

Re: capacitors?????????? - Guest - 10-26-2009

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 Icon_biggrin .

Re: capacitors?????????? - Carl Travis - 10-26-2009

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/

Re: capacitors?????????? - Joe Rossi - 10-26-2009

I get most of my parts from Allied Electronics...

Re: capacitors?????????? - Ron Ramirez - 10-27-2009

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.

Re: capacitors?????????? - Chuck Schwark - 10-27-2009

Bob is a Two Thumbs Up operation.
Great selection AND prices.
Here is his website: http://www.radioantiques.com

Chuck

Re: capacitors?????????? - Guest - 10-27-2009

Great Resources!! Thanks for the info guys Icon_biggrin

Re: capacitors?????????? - Chuck Schwark - 10-27-2009

M.H.

More great resource links http://philcoradio.com/resource.htm here on Ron's site and also the Resource Links page http://www.philcorepairbench.com/links.htm on my site.

Chuck

Re: capacitors?????????? - Music in a bottle - 10-28-2009

Chuck Schwark Wrote:M.H.

More great resource links http://philcoradio.com/resource.htm here on Ron's site and also the Resource Links page http://www.philcorepairbench.com/links.htm on my site.

Chuck
Thanks for this link Chuck. He happens to have #49 pilot bulbs that I had been looking for for a bit. Good price on them too!