Jeff Liebermann wrote:

On Tue, 13 Aug 2013 10:18:34 +1000, "Phil Allison"
wrote:

** Silver does not form an oxide under any normal condition.

If forms a sulphide layer (Ag2S ) due to air containing some H2S from
burning fossil fuels etc.

Yep. Even worse, the silver sulfide to silver junction makes a
tolerable diode (band gap = 1 eV). I was having serious problems at a
radio site with what is now known as PIM (passive intermodulation). I
had stupidly cleaned the silver plated plugs, but not the jacks. After
a week of bad guesses, I cleaned both connectors, and the problems
went away.


I had a Bird Wattmeter on the bench at one job. (QA on the PRC77) The
thing read about 30% difference from one direction to the other because
it was silver to silver in one direction, and silver to crap the other.
The Cal lab threw a real hissy fit when they heard that I cleaned it
with a piece of paper.


--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.