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#29
03-14-2017, 12:53 PM
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Here are some of the waveforms I got with the picture locked.
Sync phase inverter (12SN7, pin 4) IMG_0378.JPG Horiz, AFC (6SN7, pin ) IMG_0379.JPG Horiz, multivibrator (6SN7, pin 6) IMG_0380.JPG After I got these I tried to check the waveform on pin 1 of the oscillator tube. When I connected the scope probe to that point the lock just disappeared completely. Is that a clue? Ignore the 2 dots in the pictures, its a reflection from the ceiling light. 
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