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Thanks for the suggestions but after several more hours, still stumped.
All components have been replaced (at least once) except for the
HV transformer. Measured the current on the 6KV line and it started
out at 350 uA ( which is what is spec'd in the book) and dropped
over time as the osc slowly failed. Have also checked for leakage in
the octal 25L6 socket and cleaned all HV contacts and pots carefully.
The 1300 pF cap in the primary of the xfmr also replaced (determines
freq of oscillation).
Its gotta be leakage in the HV xfmr. Nothing else has affected the
symptoms even a little bit. Major bummer as this chassis has been
completely re-capped and rebuilt (ie-more hours than I like to admit).
Anyone have a spare HV xfmr? Have a buch of NOS flybacks to swap.
Steve
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