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It's not unusual to be unable to see all the text on a vintage set.
The picture expanding with brightness is because the HV is sagging when you draw a lot of current at high brightness.
The other problem I notice when I watch a DVD is that the macrovision and teletext at the top of the scan is quite bright and that's where I get most of the scattering off of the corner of the CRT bell.
When you say that there is a black band on the right side, are you talking about the width of the blanking or that you have insufficent horizontal (or miscentered)?
John
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