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philco 40-170CS overheating resister
RodB
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#3

02-24-2021, 10:34 AM
When you disconnect the speaker you are probably removing the field coil from the B+ power supply, thus no B+ to any of the tubes. Your clue is the warm rf transformer and warm 1k resistor. These two are in the plate circuit of the 7C7 which is probably conducting more current than it should or there is a short somewhere near the tube.
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RE: philco 40-170CS overheating resister - by RodB - 02-24-2021, 10:34 AM



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  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration