On Fri, 17 Apr 2009 15:18:30 +0100, "Steve Terry"
wrote:


"Pilgrim" wrote in message
news
In article ,
"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
Steve Terry

Is that why most, but not all, teflon insulated wire was silver plated?
Chuck P.

Yes, Silver is one of the few metals that has a lower resistance than
copper,
but oxidises easily so silver should be covered, PTFE is one of the best
coverings.

Steve Terry


Some of the newer wires have PTFE-Polyimide-PTFE insulation. Best of
both worlds.