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Don't have a ring tester. Tried unclipping the blue and red coils and interchanging their posititon on the convergence yoke, but the result is very confusing when the red and green no longer converge.
I noticed that the blue H tilt circuit uses a different capacitor value than R and G (.47 vs .39) - now I'm thinking that the convergence coil inductance is part of the pulse shaping, and if the blue is 1/3 shorted, it may be impossible to get the right waveform. I tried running the blue H tilt end-to-end, and I can make the B H convergence worse on the right side, but there is no travel to make it worse on the left side. So, this control does not seem to be centered, which again could be due to the convergence coil itself being bad.
By the way, the blue core looks cracked, but I'm not sure that is making a difference, since the mounting clip holds it tightly together.
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