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They really shouldn't be unstable if they've been recapped.
I would suspect a drifting resistor in the Horizontal or Vertical circuit (depending on which problem you are having) They use half of a 12SN7 for Horizontal AFC so I would check closely around that tube for a problem (the tube itself could also be the problem).
Sometimes heating the resistors with a soldering iron will quickly expose the ones prone to drift, you can do that with the Mica caps too but don't get carried away and melt them.
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02-25-2013, 01:49 PM
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