DIYbanter - View Single Post - What is the purspose of pre-tinned wire?

Mr. Haney

On Fri, 17 Apr 2009 17:30:45 -0700 (PDT), wrote:

On Apr 17, 7:18*am, "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.

Silver does not oxidize so much as it tarnishes,

Tarnish IS oxide, you dope. Silver oxidizes, it just doesn't grow a
crust like Copper does, regardless of whatever other elements it grabs
while doing it.

by picking up sulfur
from the air.

You are thinking of Copper.