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I never use a variac. I never plug a set in that is more than 50 years old until it has a full check with chassis out. My CTC5 had a thorough vetting first.
I will alway check and reform or replace the electrolytics and change initially the obvious papercaps that will be stressed with a high DC.
It's not worth it.
Last edited by Penthode; 02-02-2021 at 09:33 PM.
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