Re: Poor solderability of old components, solutions?
I wonder if your components have been "electroless" tinned: we found that this type of plating was virtually unsolderable after several years.
My "discovery" re. cleaning leads etc is to use a specific type of kitchen scourer "Stainless Steel Scourer" (sold by Morrisons etc): they look like very perfect lathe-turnings and are quire soft to the touch, but excellent for removing dirty plating. They do not shed anything either (as opposed to wire wool or emery).
John
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