Posts: 93
Threads: 20
Joined: Aug 2014
City: Greenville, TX
I rebuilt the electrolytic and fired it up. Volume was low and sound distorted. Tested all tubes. For a while plate and screen voltages were correct, but now they measure 120V! Where to start? Can this be a problem with the AC/battery switch?
Posts: 7,283
Threads: 268
Joined: Dec 2009
City: Roslyn Pa
Clean AC/Battery sw and check R-12.
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
Posts: 93
Threads: 20
Joined: Aug 2014
City: Greenville, TX
Flushed switch with Deoxit. R12 checks OK. No change.
Thank you
Posts: 7,283
Threads: 268
Joined: Dec 2009
City: Roslyn Pa
Update...
Talked w/ Dale on the phone to find that he have a bad connection in the filament circuit. With the filaments not conducting there is no load on the HV supply that's why the HV was too high.
After cleaning up the tube sockets it was sort of working. It also had a very leaky .004 coupling cap at the audio output tube's control grid. After replacement it working much better.
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