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Philco 39-7 restore help
#3

Morzh. Thank you for the input and suggestions.
eCap before power up. Understood.

For my ongoing learning.

Is there proper/relatively safe method to bring the radio up on power without first replacing the eCaps?

In this case the past owner said he had turned it on a day before selling it to me and it worked but he could not tune stations. I checked the eCaps with a meter before hooking it up and they were close to spec and low ESR. I then used a variac and dim bulb tester to bring it up slowly to 115vac while watching for any indication of a short.

Is there something else I could/should have done?

I have a copy of the 84 tube datasheet that I used to identify the pins. I also looked up a second one but I do not see anywhere on these two datasheets a specification for the filtering capacitance. Could you point me to a datasheet that provides this information as it seems to be eluding me? Or is the a design chart or calculation needed to compute the value?

Regards, John


Messages In This Thread
Philco 39-7 restore help - by jkaterenchuk - 05-29-2020, 08:04 AM
RE: Philco 39-7 restore help - by morzh - 05-29-2020, 11:49 AM
RE: Philco 39-7 restore help - by jkaterenchuk - 05-29-2020, 12:31 PM
RE: Philco 39-7 restore help - by Radioroslyn - 05-29-2020, 12:40 PM
RE: Philco 39-7 restore help - by morzh - 05-29-2020, 01:51 PM
RE: Philco 39-7 restore help - by jkaterenchuk - 06-04-2020, 09:22 PM
RE: Philco 39-7 restore help - by morzh - 06-04-2020, 10:21 PM
RE: Philco 39-7 restore help - by Phlogiston - 06-04-2020, 11:26 PM
RE: Philco 39-7 restore help - by jkaterenchuk - 06-07-2020, 05:41 AM
RE: Philco 39-7 restore help - by jkaterenchuk - 06-18-2020, 07:26 AM
RE: Philco 39-7 restore help - by Radioroslyn - 06-18-2020, 11:58 AM
RE: Philco 39-7 restore help - by jkaterenchuk - 06-23-2020, 09:44 AM
RE: Philco 39-7 restore help - by Radioroslyn - 06-23-2020, 05:09 PM
RE: Philco 39-7 restore help - by rfeenstra - 06-23-2020, 10:20 PM
RE: Philco 39-7 restore help - by jkaterenchuk - 06-27-2020, 09:48 PM
RE: Philco 39-7 restore help - by rfeenstra - 06-27-2020, 10:12 PM
RE: Philco 39-7 restore help - by RodB - 06-27-2020, 10:20 PM
RE: Philco 39-7 restore help - by Radioroslyn - 06-27-2020, 10:24 PM
RE: Philco 39-7 restore help - by jkaterenchuk - 06-28-2020, 06:46 AM



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