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been having some issues with the spot that results when you turn of the set, not sure why this one does it an my other does not, but a quick fix was to put a resistor/cap in series from the crt cathode to ground. The cap charges during normal viewing, when you turn the set off, the cap discharges into the cathode holding it positive while it cools off biasing the tube for about 15 seconds, no spot. I was worried that it could burn the CRT.
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