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Check for arcing at the CRT...Slip a screwdriver under the cup and see if it sparks decently.
Might be good to compare the horiz osc waveform width to sync pulse width on a scope to confirm it is on freq...If not severe reduction in HV can result.
Your pre-recap symptoms depending on exactly how they manifested could be attributed to caps or bad grounding of circuit boards, etc. Another possibility is bad solder joints on the osc coil.
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