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Originally Posted by stromberg6
Mine has a very small purity problem in the lower right corner, and I think it might be due to the tube needing to be degaussed, but I'll try the magnet again.
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I tried degaussing this one too, but the spot persists. It's pretty close to optimal, but there's still a tiny little area I can see where it's not right. It's a shame, because the tube checks as new on the tester. None of my other sets even needed the purity magnets, the screens are just perfect.
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BTW, I notice that your 4 also doesn't fill the screen all the time at the left side. Interesting; mine does the same thing. If I increase the line volts to 120 I can get a full pic. These things have notoriously poor voltage regulation, so maybe that's one of the problems. Don't want to screw around with the width circuit again yet.
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I haven't yet messed with the width controls on this set, because the replacement centering pot's shaft is too short for the knob to fit on it. I think once I graft an extension on it and adjust horizontal width, the screen will look normal.