08-23-2023, 01:46 PM
I've got a Philco 41-601 on the bench. It has plenty of hum, and the audio amp is working with signal into the turntable input. The tuner side, not so much. The alignment of the IF was off, down around 421kHz, and I have adjusted it back to 455kHz, but my usual loop-to-loop transmission from my signal generator produces no sound at all anywhere on the dial.
The local oscillator is producing the expected range of frequencies.
All the capacitors have been replaced, but not by me.
I'm having some difficulty understanding where the AVC voltage is and what it should be. This is both similar and different when compared to the AA5 circuits with which I am slightly more familiar.
Your help will be greatly appreciated.
The local oscillator is producing the expected range of frequencies.
All the capacitors have been replaced, but not by me.
I'm having some difficulty understanding where the AVC voltage is and what it should be. This is both similar and different when compared to the AA5 circuits with which I am slightly more familiar.
Your help will be greatly appreciated.
