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.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558