Quote:
Originally Posted by stusnyder
I just ran into that. Focus coil was off centered to the crt neck.
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Centered isn't always the best position. Sometimes you have to intentionally adjust it to a position significantly off center and out of plane. Just do whatever gets you a nice centered picture with no shadows.
As mentioned above, there can be significant interaction between the ion trap and focus magnet. It may take a while, but you'll likely find positions for both which give you a nice bright, centered picture with no shadows.