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No experience with the synchrolock circuit, so can only make ignorant comments:
1) I'd look for cold solder joints too, but not expect to find any if I had replaced all the parts
2a) Any possibility of having a replaced part value with the decimal point in the wrong place?
2b) Does anyone know of parts value mistakes in schematics depending on the source?
Edit: 3) is there a way to break the loop (like grounding the phase detector output) to see if the oscillator is stable or jumps around by itself?
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Last edited by old_tv_nut; 07-14-2026 at 05:22 PM.
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