Quote:
Originally Posted by old_coot88
Arr. Now we're cookin'. First assuming the output transformer and yoke coils have proved good, I wouldn't worry about the oscillator just yet, but first prove whether the output stage is working or not. Just inject some AC at the control grid (pin 5) of the 6V6. No need to disconnect anything, since everything 'upstream' is high impedance and DC-isolated by C50. Just run a jumper from pin 7 (heater) to pin 5. That'll put 6.3VAC directly on the grid, which should give a few inches of deflection (and it should vary somewhat with the linearity adjustment). If it does, that would indicate the output stage is working, and the failure lies upstream in the osc. area.
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Should I get a few inches of deflection total? or a few inches more deflection than I have already, which is already a few inches?