06-22-2022, 02:11 PM
You could pull the 80 tube out and power the chassis up. All the tubes should light except for the 80, the dial light and the light for the shadow meter. Check the hv at the plate pins of the 80 socket back to the - side of the filter caps. Both are connected to the ct of the hv winding. Voltage from ct to either end should be within about 10v of each other. All this is done with the 80 tube removed.
All of the resistances look good for the opt, driver trans, and sm coil. No parts hunting for those bits.
If you can't get the switch to work it might be time to give Mark O a call and order a new volume control. If it's the original it going to be pretty worn anyway.
All of the resistances look good for the opt, driver trans, and sm coil. No parts hunting for those bits.
If you can't get the switch to work it might be time to give Mark O a call and order a new volume control. If it's the original it going to be pretty worn anyway.
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 it!
Terry
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
