21ax gassy or bad 3a3?

[Username1]

The yoke which is a coil, makes up a tank circuit with a capacitor that makes up part
of the B+ Boost, and load on part of the flyback. All of these are tuned. Jumping
a short across the coil on the yoke surly has an effect on the rest of the sweep
circuits. Even if some have jumped something and not had anything go wrong, I would
say it's not a good idea..... Especially if you are trying to troubleshoot something in
that area of the set....

For your problem, you need to check to be sure items in the area are working
as best you can... Voltages at the different points on the picture tube. (Bias -
Gx pins, Focus, HV, Horiz output tube Cathode current in range, sweep circuits
working, etc. )

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