06-07-2013, 10:57 PM
Hi all,
I've picked up a Philco 39-30 recently and, in doing some research, found that Ron recommends replacing the two 370pF silver mica caps with silver mica caps that have a 390pF value. I believe these caps are used in the push button tuning mechanism. What voltage should I be using? I also have a 41-256 that I believe has silver mica caps as well. Would I use the same value and voltage for this radio as well?
And since I'm on the subject of voltage, is there any way to find out what voltage I should use when replacing the electrolytic caps on my 39-30? I seem to recall reading somewhere that 450 volts is acceptable, generally speaking. Is that correct? Or, am I totally wrong? The service notes don't say what voltage the electrolytic caps are and the cans on top of the chassis with all that helpful information are missing. I know the voltage and mfd is usually printed on the can.
Thanks a lot, Tom
I've picked up a Philco 39-30 recently and, in doing some research, found that Ron recommends replacing the two 370pF silver mica caps with silver mica caps that have a 390pF value. I believe these caps are used in the push button tuning mechanism. What voltage should I be using? I also have a 41-256 that I believe has silver mica caps as well. Would I use the same value and voltage for this radio as well?
And since I'm on the subject of voltage, is there any way to find out what voltage I should use when replacing the electrolytic caps on my 39-30? I seem to recall reading somewhere that 450 volts is acceptable, generally speaking. Is that correct? Or, am I totally wrong? The service notes don't say what voltage the electrolytic caps are and the cans on top of the chassis with all that helpful information are missing. I know the voltage and mfd is usually printed on the can.
Thanks a lot, Tom
