Quote:
Originally Posted by Mre12ax7
Since this is a lower end set the horizontal output tube is also the oscillator.
The vertical will sync fine.
All resistors connected to the AFC diodes have been replaced.
The 6AU8A sync separator tests fine on both sections with the sync section testing at 100%.
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Sorry! Your statement regarding the horizontal output tube, being the oscillator is incorrect. The set uses a 6CG7 and a 12BQ6, horizontal output.
That model has always been tricky to trouble shoot in that circuit. There was two different variations in that circuit. One used the diodes and a 3AU6 audio IF tube and the earlier run used a 5AN8, for the audio and the triode side used as the horizontal AFC. I don't remember getting one of those sets working really perfect.