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At some point of frustration it pays to replace every cap and resistor (and diode if any) in a sync circuit,and do it carefully, undoing every lead completely and
resoldering with all new solder. And at least check each coil as best you can.
I fixed a flaky horizontal sync in my CT-100 and the similar circuit in an older
RCA set by doing that. And yes, its perfectly OK, in sync circuits (not RF oscillators!) to replace mica with NP0 ceramic. Its also perfectly OK to attach leads to surface mount caps (less so resistors, as they depend on the board for heat sink) and use them.
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06-25-2025, 11:10 AM
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