02-27-2021, 09:58 AM
Just from a cursory look your voltages it would seem that something is wrong at the cathode of the detector. I would think that with 50k to ground you would have more than 1.4v. Check for bad tube, socket, wrong value resistor, damaged cap by soldering iron, ect. Grid to cathode leakage or short could do it.
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
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