In article ,
Robert Morein wrote:
I don't understand your reasoning. Electrical copper is, or should be,
in a completely annealed state. Heating the copper up isn't going to
hurt it.

Don't know the theory, but if you flex a wire close to a soldered joint it
will always break at the joint. Perhaps it's a chemical reaction?

[Thinks.] But don't you have to quench copper if annealing?

--
*Never slap a man who's chewing tobacco *

Dave Plowman London SW 12
RIP Acorn