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Checking the HV and sweep tubes on a tube checker is not a very good indicator of their true condition. They might test OK on the checker but not function under full voltage in the circuit. The best test is to substitute each tube, one at a time, looking for any changes in your problem with a blooming pix. Make sure you don't touch any high voltage points that could retain a charge when swapping out tubes. If the tubes are not the problem, you may have circuit problems in the regulator circuit or HV related circuits.
Gilbert
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02-27-2008, 11:53 PM
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