Thread: 1965 Motorola Black and white TV, curbside find
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Old 10-11-2015, 04:45 PM
Eric H's Avatar
Eric H Eric H is offline
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Bad HV rectifier tube is one possibility, particularly if the picture looks okay otherwise.

Turning the brightness up puts an extra load on the tube, if it's weak it can't supply enough HV and the picture blooms and darkens.
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