Quote:
Originally Posted by Notimetolooz
See if there is any places that might be draining off the HV. Ceramic cap C142 could be leaky. Check the resistors around the horizontal output. Measure the HOT voltages except the plate cap.
I wonder about the accuracy of HV probes but yours wouldn't be off that much.
Make sure the outer coating of the CRT is grounded, it forms a filter cap on the HV (along with C142).
You might check the adjustment of the horizontal drive C136B. Do not use it to adjust the HV however, you could damage the HOT that way.
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C142 has worried me since I started this. The capacitance is on the money but I haven't checked for leakage. Where does one find a 500pf cap at 10,000 volts!? I should probably check the damper cathode voltage first. I've messed with C136B too during the wild L121 party. Crap! I have taken the CRT out and put it back in so many times, the Aquadag is wearing where the ground loops contact it so I can spray those spots with the Bonderite graphite spray I have.