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John -
No high voltage whatsoever at the moment. This was indeed a sudden failure - the damper tube arced a couple of times, but the set was still working when I turned it off 15-20 seconds later. I didn't power it up again until after I replaced the damper tube (about a week or so), and it was dead at that point.
Re: tuning the frequency: I'm going to bring my function generator home from work tomorrow to set up my scope; that way I can make sure that the oscillator is indeed on frequency.
There is a horizontal efficiency coil in the plate circuit of the damper tube.
I'll scan in the high-voltage section of the schematic tomorrow and post it.
Thanks!
Jim
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