05-01-2017, 11:13 PM
Could be rf interference from a charger. My fridge makes a loud hum in the radio when the compressor turns on. Double check the resistors around the volume control and the dress of the wiring. May have some heater to cathode leakage. Check that your bias filter cap is connected properly w/+ side to the chassis - side to the pt ct.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
