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Well, I finally got back in the old_tv business this weekend.
I checked out the convergence circuits by putting a current probe on the covergence coil wires, and I see all three are getting H convergence parabolas. However, I just can't get convergence, (R-G vertically and B horizontally). I tried playing with the positioning, since I can't see the pole pieces (covered by dag). I'm guessing now that I can't get the coils forward enough - the greatest action occurs when it is right up against the yoke, which has to be where it is for purity. (The yoke is almost all the way forward too, as you would expect after subbing the bell-shaped 21FB for the cone-shaped 21AX.)
Not sure what to try next - maybe if I forget purity and see how far forward the yoke will go, I can try moving the convergence coils further forward just to see if convergence improves.
By the way, the donor visited a few weeks ago, and was happy to finally see pictures on the set he remembers watching at home - so the work has some purpose so far, but I sure would like to get it right.
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