05-25-2026, 11:14 AM
I restored this radio about 10 years ago, replaced all caps, electrolytic or otherwise, and it has been working great daily until last week when I turned it on and heard a sight ‘zip’ and then no sound.
There’s 210vdc on the rectifier 80 but no other high voltage anywhere throughout the circuit. Tubes are lighting up and tried swapping tubes for each of the five.
I thought that maybe the output transformer or the field coil winding had opened up, but that doesn’t appear to be the case. Swapped in another single ended OT still nothing. As far as I know about the field coil winding, there is some magnetism on the case and the coil itself measures 1200Ω. Checked all resistors and there are looking good.
I work a lot on amplifiers but not a whole lot on radios, so I’m running out of ideas to troubleshoot.
Does anyone have any ideas as to what to do to repair this?
There’s 210vdc on the rectifier 80 but no other high voltage anywhere throughout the circuit. Tubes are lighting up and tried swapping tubes for each of the five.
I thought that maybe the output transformer or the field coil winding had opened up, but that doesn’t appear to be the case. Swapped in another single ended OT still nothing. As far as I know about the field coil winding, there is some magnetism on the case and the coil itself measures 1200Ω. Checked all resistors and there are looking good.
I work a lot on amplifiers but not a whole lot on radios, so I’m running out of ideas to troubleshoot.
Does anyone have any ideas as to what to do to repair this?
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
