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Can you be more specific?
If the image doesn't appear, click here.
That's a picture of the back of the C-28 I just acquired. The RCA connections need some love -- they seem a bit oxidized and whatnot. I've already gone over them quickly with some very fine-grit sandpaper and Caig ProGold, but there's still some oxidation. I'd love to read some advice on how to get these things shiny like new.