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In Reply to: RE: Scott 130 preamp question posted by gkargreen on March 14, 2017 at 17:15:15
What is "IPA"? It's not a contact cleaner I'm familiar with.
I hadn't realized isopropyl alcohol would remove silver sulfides, but I'll give it a try!
The Noxon 7 I mentioned has oxalic acid in it that removes stubborn oxidation on brass and tin-plated connectors, but it's not for use on silver. It can work wonders on miniature 9 and 7 pin tube pins if used delicately.
With the Pyramid Imps, I realize I'm taking a risk, but I work on a lot of older gear. 400V caps like this run at 110-120V DC are less likely to fail that when run > 300V, but it varies a lot by brand and type. CDE had a line called "Tiny Chief," and they are pretty much always bad.
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