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I've been working on my spare CRTs and this one is giving me grief. I believe I've exhausted the flowchart. Here's what I've done so far trying to rectify the low and unadjustable B+ voltage.
  • Cap kit completed including new filter cap
  • New flyback
  • New B+ Potentiometer
  • New voltage regulator
  • Swapped in a used HOT for kicks
    • Base to Emitter .5V
    • Base to Collector.5V
  • D601-D604 all read .49V
  • R609 180 Ω
  • R604 1.1K Ω
  • Both fuses have continuity
Weird side note: if I test the B+ on the BJ post behind R609 then I get a little crackle of high voltage into the CRT. Odd?

Could the used HOT be failing under load.
What's next?
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