On Fri, 17 Apr 2009 22:35:39 +1000, "Phil Allison"
wrote:


"Pilgrim"
"Steve Terry"
"Sandi"

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


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


** No.

Teflon coated wire intended is for high temp applications.

With the sole exclusion of anything related to a nuclear reactor.

Teflon turns to powder in that environment, and they (Genral Atomics)do
not use it in such settings. You will see it used on the Predator,
however.

Silver has a much higher melting point than tin ( just a tad below copper)
and is more corrosion resistant too.

Also, purified Silver Oxide, made in the lab, conducts better than the
element itself does. Silver oxide on wires, and other conductive
surfaces creates a protective 'patina' on the surfaces that are exposed
to the air. In wiring, it does not affect the overall conductivity of
the wire. In the lab, it is the top dog.

Most conductive element: Silver

Most conductive compound: Silver Oxide






..... Phil