07-05-2013, 01:37 PM
Vic,
This same cap was used in many prewar Philco's, 41-290/41-295 etc., and has been the topic of discussions on this phorum before.
Typically, as in your set across the primary of the 1st. IF. It is debateable whether this is a molded mica or molded paper due to the relative high value of 3000pf. Some have been found to be paper not mica. Micamold caps do have a reputation for failure. Silver mica was generally not employed in consumer electronics till post WWII. I would disconnect one side & test for leakage & value. Personally, I would replace it with a new silver mica, which I did in my 41-295, since it is inside the IF can. That way you don't have to think about it any longer.
John
This same cap was used in many prewar Philco's, 41-290/41-295 etc., and has been the topic of discussions on this phorum before.
Typically, as in your set across the primary of the 1st. IF. It is debateable whether this is a molded mica or molded paper due to the relative high value of 3000pf. Some have been found to be paper not mica. Micamold caps do have a reputation for failure. Silver mica was generally not employed in consumer electronics till post WWII. I would disconnect one side & test for leakage & value. Personally, I would replace it with a new silver mica, which I did in my 41-295, since it is inside the IF can. That way you don't have to think about it any longer.
John
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