04-06-2008, 09:54 PM
Hi all,
When I was restoring my Philco 90 (single 47 output tube) chassis, I found three paper capacitors which are not shown on the schematic or in the Philco drawings. See the circled caps in the photo below.
Two of them are Philco brand and the third is some off brand. All are .05uf. From what I can tell, they seem to be in parallel with caps that are in the bakelite blocks, drawings #18, 26, and 46. Do you think they were added by a repairman? Or is it possible that they were part of a product design change?
Oh, the paper block capacitor on the chassis right side wall is definitely an added unit. It was installed 10-10-36. I have removed that unit since this photo was taken.
Regards,
Ed
When I was restoring my Philco 90 (single 47 output tube) chassis, I found three paper capacitors which are not shown on the schematic or in the Philco drawings. See the circled caps in the photo below.
Two of them are Philco brand and the third is some off brand. All are .05uf. From what I can tell, they seem to be in parallel with caps that are in the bakelite blocks, drawings #18, 26, and 46. Do you think they were added by a repairman? Or is it possible that they were part of a product design change?
Oh, the paper block capacitor on the chassis right side wall is definitely an added unit. It was installed 10-10-36. I have removed that unit since this photo was taken.
Regards,
Ed