Quote:
Originally Posted by Yamamaya42
From what I understand, the horizontal oscillator should be able to free run at 15.7khz approximately without any external influences, IE, no rf signal or anything, the incoming video only keeps it locked in step as needed to hold the picture to be seen, so that circuit before the horizontal oscillator (couplet), really should not be having any effect for you to tune it to 15.7khz, something else weird is going on.
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The truth is in the whacked picture but maybe I need to evaluate the frequency on another scope. I'm using my HP digital which has always been accurate when assessing frequencies.
The waveform at this point is easily manipulated by B1 and I have it dialed in to the exact shape seen here. I also have a sawtooth waveform at W12 but, again, the same off frequency signal. I'll play around with it tonight and double check for idiot based errors. The tubes test good and I have switched them with known good tubes, the tube sockets are OK and the 5% and 10% resistors are in tolerance.
But again, I'll see if I did something stupid.