Quote:
Originally Posted by old_tv_nut
1) From the picture, you are only off by 3 or 4 cycles per 60 Hz, or 180 to 240 Hz. You should be able to adjust L31 (A16) to go through zero beat and be off either way, from a few hundred Hz too low to a few hundred Hz too high. Can that be done? If so, the system should pull in when you get close to zero beat. If it doesn't, the problem is in the phase detector or reactance tube circuit, not the oscillator. If you cannot go THROUGH zero beat to be off either way, there is a problem in the oscilator circuit.
2) I hope you meant your meter reads 3.48 MHz, not 34.8 Mhz, but even that is very wrong and does not correspond with the number of rainbow bands you are seeing. Forget the meter.
3) A 3.58 MHz crystal and a 3.579545 are the same thing, just stamped with fewer digits. The one you wouldn't want would be 3.56 or 3.59, which would be used in a gated rainbow generator, not a TV.
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correct, it WAS 3.48 MHz that the meter displayed :p oops
and i did try adjusting L31 (A16) and it did not seem to have any effect that I could see on the scope.
I will try again once I go over all the caps. i have already checked all resistors, found 2 wrong.