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Old 01-19-2017, 10:35 AM
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benman94 benman94 is offline
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Join Date: Jun 2011
Location: Detroit, MI
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IIRC the HV would start arcing to the screens when the vacuum became softer. Still hard enough to produce an image with minor focus issues, but soft enough to allow an arc. Your tube may be going gassy, which wouldn't exactly be a surprise with a 15GP22. (Neil and Harry have been dead for years so I can't ask them directly anymore.)
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