People seem to argue about that eraser. I bought an expensive super malleable artists eraser from an art store, then I am pretty sure I read a spit on the monitor rant after ward not to use them on RF connectors. I don't know if this is because someone got beat with an antenna after destroying a 1.1mm? connector or something. I have been scared to use it. There is like 3 grades of erasers I have used, the red pencil one, a much softer white premium one and then the dough-like one.
I guess alcohol would be my first general method of cleaning this, but my hopes in this working waned when I saw the spec of green substance, I don't think its usually that good. Plus these contacts have a weird shape, it is like a half C with 2 more indents in it, so a more wavy beat up C with a place for a ball bearing's tip to line up, the geometry is such that I expect a cotton bud to get torn up on the edges. Maybe I can take a microscope picture of it when I take it out of the circuit. I think I would need to twist the cotton bud into a little 'rope' and pull it back and forth the contact in order to get any kind of scrubbing.
You can imagine these contacts to almost be like a lighting bolt that is offset from the the bakalite by 1mm with a spinning disk under neath.
I don't want to take it apart yet because I need to make or buy heat sink clips to put on some pieces of bare wire because I am scared it will go up into the insulation when I resolder it.
I am also not sure how it comes apart, it looks like its held into place with some kind of green retaining compound, making me wary about alcohol. Like the bakalite disks have odd-shaped rivets inserted into them that are stamped with the profile of the shaft and glued into place with what I can best guess is loctite green retaining compound, if it was around in the 40's. Retaining compound for people that don't know is something you put between a shaft or loose interference fit to make it a good mechanical fit, i.e. cheaper way to do things that would normally be shrink-fit with heat or pure pressure.
Also kinda worried alcohol might take that apart, with its fumes, so I was hoping for an aqueous cleaner, so I can basically put the switch in a pool sideways and rotate it after chemical cleaning is complete on each small section that could be dipped without getting the shaft wet, but I think this might also rust it.
I think I can turn one of those copper alligator flat clips into a heat sink clips by hammering it around a drill blank to make a conformal copper jaw so I can desolder it to 'factory' levels of solder reliability, with out solder wicking under teflon cable insulation. I kind of think that the way I think they did this might some how be wrong because my explanation sounds really crazy.
I am not beyond buying a bottle of retaining compound to re-glue it though, but I never wanted this kind of complexity. Its a ship in a bottle with working mechanisms soldered to thick RF connectors. I think it might be more complicated then doing a watch repair because of the possibly fragility.
great, these aligator clips are made from some weird form of magnetic copper