Steve Terry wrote:

"Sandi" wrote in message

snip
Does the tinning-coating replace where copper would have been in
the overall wire and tinning is of higher reistence?
Is flexibility affected?

Tin has a much lower conductivity than copper, and as RF travels on
the surface of a conductor, it would attenuate RF and high frequency AC

Largely irrelevant since the RF flows on the surface of the entire bundle
of conductors, not individual uninsulated strands.

Graham