Another Westinghouse H840CK15

[trinescope]

Yeah, that was one idea I tried early on for the focus pot repair, but the India ink I tried was a bit too conductive. I laid out a strip on paper and got less than 100K resistance. Now I was able to use it to repair the red screen pot since it arced and burnt at the end of its track where it was riveted. The resistors are available at Mouser, but they're about $20 a piece. I have only one meter (Keithley 196) capable of measuring resistor values this high, but it's in need of calibration for the resistance function and I'm not sure how accurate the readings really are. I calculated the voltages I should get from the schematic, so I'll try making measurements later to see where I'm losing voltage. The voltage at the 6BD4 grid is low (200V, needs to be closer to 300-400V) to get it to start conducting and lowering the HV to spec.