Philco 46-250 code 125? - Printable Version
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Philco 46-250 code 125? - Tgace459 - 10-29-2017
Looking for advice.
I'm working on what I believe is a Philco 46-250 Code 125. That's whats on the cabinet label and the chassis. The schematics I found online are labeled as such. A couple of the tubes didn't match the schematic, but I understand that wasn't unusual post-war and the the rectifier and output tubes were replaced with equivalent tubes with different bases.
BUT there are other big differences when I looked under the chassis.
[Image: https://i.imgur.com/nsYVQIZ.jpg]
[Image: https://i.imgur.com/c9FjnqE.jpg]
The terminal strip the top arrow points at doesn't exist in the schematics I have. And while the schematics called for a twin 20 mfd filter cap, the radio I have had ENTIRELY different values. The Twin cap was a 50(red)/30(blue) and there was an entirely different (and unlisted) cap between the two arrows (a 40 mfd from the #1 pin of the 7C6 to the terminal strip.
[Image: https://i.imgur.com/hOdoCJj.jpg]
I'm sort of at a loss here......
RE: Philco 46-250 code 125? - Tucker - 11-09-2017
Are you sure you have the correct schematic? I would move the electrolytics somewhere less crowded if possible and put them on a terminal strip if you can. That chassis looks a bit crowded.
RE: Philco 46-250 code 125? - Radioroslyn - 11-09-2017
Hi,
One of the reasons for the discrepancy in the diagram regarding the filters is the old version used a dynamic spkr were your set has a pm spkr. W/o the field coil the power requires more capacitance to remove the 60cy hum. You'll rarely see 50/30mf cap in a set w/a dynamic spkr unless in it a replacement w/what was on hand at the time. Go with a pair of 47mf@160v. The blue beaver cap is a replacement from back in the '60s, remove, dispose, and ignore.