Still fighting this set. After lots of attempts at getting the purity and convergence setup correctly I can get good color purity but am unable to get the picture to have good horizontal centering, I am left with unused screen on the right side. I can use the centering rings to center the screen but then cant get good color purity. I have checked the B+ and boost voltages all measure good also tried swapping the horizontal output and damper tubes but seen no improvement. This suggests that the issue is not a width problem.
In looking back at pictures the centering issue was not present before I swapped out the CRT, now to be fair I had not checked for purity on the old CRT so the issue may have been there, still could it be the new CRT? Also since installing the new CRT I ran into an issue with HOT high current, it was an intermit resistor that would measure ok on the bench but fail in operation. I resorted to shotgunning lots of parts, while I have checked and rechecked all part values I certainly could have made a mistake somewhere. Thoughts on any key components I should check that would allow the set to operate well but not have horizontal centering.
I was browsing schematics and it looks like earlier RCA sets did have horizontal centering via a 10 ohm pot across taps on the flyback which then feed the yoke. Maybe something can be hacked in but I'm not up to that without good guidance.
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