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RE: Yearly Copper Post Cleaning

Actually? The WORST of it, IMO, is that copper oxide is a semiconductor and was at one point used to make those 'stack' rectifiers.....Which were also made of Selenium....IIRC.
Since the voltage is so low? I'd be carefule using pure copper in MM or MC circuits. Also? ANY dissimilar metals CAN form a junction which produces a minute (like real small) current. This would be how a Thermocouple works.

LINK is virtually ALL the common thermocouple 'types', defined by alloys used, in use today.
But ANY metals in a 'junction' will produce a very small current......which in worst case may be enough to offset a phono signal....
I've experimented with a piece of coat hanger AND a piece of copper wire. A SLIGHT current was measured at high temps......I think I used my BBQ as heat source, so not a REAL good TC, but illuatrates the principle.
Too much is never enough

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