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ok now I remember, the HV is controlled by a horz bias pot which directly bias's the Horz out. So you adj the HV to about 25kv with that pot. The regulation takes place from feedback from the fly. The problem I ran into was the excessive heat (to the point of severe wax melting and even smoke) so adj the bias down to get the heat down resulted in under scanning of the crt. That was resolved with a HV disc cap across the yoke horz windings. Pretty mickey mouse fix that maybe was not the right thing to do. Perhaps it needed a new fly.. whatever just don't leave the set alone (good idea for any 50 year old color tube set). I think I adj to about 23kv
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