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Dave,
Yes if the frequency is way off the HV will be low. The flyback circuit is tuned to about 4 times the horizontal rate. A counter or scope is the best way to troubleshoot this kind of problem.
I had one of these 50T Philcos drive me nuts with low HV, turned out I put the wrong value cap (missed the decimal point) in the flyback circuit. The HV is developed during the retrace time (about 10us) my replacement cap changed the timing to less than 4us.
The coarse frequency adjust is the coil along the left edge, front (nearest to volume control). If adjusting this doesn't bring frquency within lock range, I would replace the 270pf and 1500pf caps connected to the coil, and of course check the coil for continuity. It's center tapped, 40 ohms and 100 ohms either side of CT.
Your dc grid bias on the hor output will depend on the hor drive setting, wouldn't worry about that until the frequency is correct.
Chuck
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Last edited by ChuckA; 07-03-2004 at 07:50 AM.
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