05-25-2016, 10:23 PM
Seem as though I misspoke. Filament where working ok then it went back to having .5v on the IF amp and the 1st audio tubes. And the voltage on the other 4 tubes is a little high from 1.75 to 2.0v. GRRRRRR I think I hate loctal toobs!!!
Have cleaned the pins and sockets, replaced 56 and 48 (voltage divider resistors) jumper out the filament choke in the mixer circuit, cleaned the ac/battery switch. Can't find my 0-30vdc p/s, thought I would put it in the dc mode and power the filament though the p/s and battery cables to see if the voltage even out across string. This thing is mighty annoying!!!!
1st pic is a simplified diagram of the filament wiring and what the voltages should be.
Pic 2 is what I've got. Should have 1.5v across each one.
Terry
Have cleaned the pins and sockets, replaced 56 and 48 (voltage divider resistors) jumper out the filament choke in the mixer circuit, cleaned the ac/battery switch. Can't find my 0-30vdc p/s, thought I would put it in the dc mode and power the filament though the p/s and battery cables to see if the voltage even out across string. This thing is mighty annoying!!!!
1st pic is a simplified diagram of the filament wiring and what the voltages should be.
Pic 2 is what I've got. Should have 1.5v across each one.
Terry
