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Restoring a Philco 71 Code 121-No sound
dmblackburn
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Posts: 23
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Joined: Feb 2021
City: Durham State, Province, Country: NC
#1

06-30-2024, 04:44 PM
This radio has an inoperative On-Off switch. I jumpered a bypass on the switch to allow the radio to power on. Voltages are about 10% above spec on the plates and within spec on the screen grids. Filament voltages are spot on.  All tubes have been tested OK. Filaments and dial light are lit. My line voltage is 115 volts AC but when I measure the voltage on P/N 49 (the Bakelite block that encloses 2 x 0.015 safety capacitors [I just replaced these within the block after removing the contents], I am getting a 55.6 volt reading on the side leg that connects to the On-Off switch.  Also, there is no sound at all (even static or hum) coming out of the speaker. Incidentally, another 71-B that I rebuilt has the same voltage on the Bakelite leg as the line voltage.

Could this be an issue with the transformer ?
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Restoring a Philco 71 Code 121-No sound - by dmblackburn - 06-30-2024, 04:44 PM



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