As parts drift in value over time, it can become necessary to readjust the convergence as required to get acceptable results. I have only ever seen one roundie that had perfect, and I mean perfect convergence. You'll never guess- it was one of those price leader 17MT80 Philco hybrids! I've never had another set before or since that was as good as that one, they have all been a compromise. It was just amazing, not a single misconverged beam even at the extreme edges of the screen. I sold it to a guy in Chicago not long ago.
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Evolution...
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