Quote Originally Posted by Khom View Post
Just for interest - when I recapped my SL-1200Mk2 I checked all removed capacitors and everyone has passport capacity with tolerance +5..-10% and suitable ESR (I compared ESR with new ones). However, caps should be revised first of all anyway.
Hi Khom,

I think I did not pay enough attention here. Did you record the desired ESR for each cap? I'd be very interested in the types and values you used.

Boy does my deck sound great now...yet only for the first 60 minutes or if I'm lucky 90 minutes. Then something is warmed up enough to start oscillating and mess up the entire sound. This must be related to the board and the caps since I've had very different regulators in place which all exhibited this same issue.
I did take some measures and almost thought the issue was solved only to discover a bit later that it persisted.

My assumption is that the filter and signal couple caps (around FG, 6680 and 6675) do not play a role in the oscillation and it is all associated to the caps used in the power supply or armature coil decoupling. But I might be mistaken.

I would like to solve this issue any help is appreciated!