Bob, I wouldn't be too quick to call it silver oxide. Silver chloride and silver sulfide are more common than silver oxide and all are black and conductive. One way to tell is silver oxide is removed with heat so a blast with the heat gun (300C) will make it disappear. (See https://en.wikipedia.org/wiki/Silver_oxide)
73; Fred, AE6QL -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of Bob McGraw - K4TAX Sent: Sunday, August 2, 2015 4:10 AM To: [email protected] Subject: Re: [Elecraft] K3_no_xmit,_no_receive? FIXED! (for now) To me it looks like the normal oxidation process that occurs due to reaction between silver plating on the connector and oxygen in the air. The dark color is silver oxide. {Some of you chemists can better explain this effect.} 73 Bob, K4TAX On 8/2/2015 12:06 AM, Wes (N7WS) wrote: > If you want to see intermittent connections... > > https://groups.yahoo.com/neo/groups/Elecraft_K3/photos/photostream/lig > htbox/692485818#zax/2040317344 > > > Note: The connection is purposefully disconnected to show the > corrosion inside the socket. > > And no, I don't live on a tropical island. The average RH here the > desert of Tucson is less than 20%. > > On 8/1/2015 8:08 PM, Guy Olinger K2AV wrote: >> With problems of this sort, it is very important to make sure that >> the TMP connectors are FULLY seated. Otherwise it is possible to have >> the center pin just BARELY making contact. This will cause an >> intermittent problem to reappear at the most inconvenient times >> possible (been there, done that). >> >> If all you did was to wiggle to fix it, then at least one of those >> TMPs is NOT fully seated. You need to check them all again. Note that >> most of the barrel beneath the fins is in the socket when they are >> fully seated. >> >> Rotating the TMP just a little as you push in is sometimes useful. >> >> Good luck and may you not flounder around nearly so bad as I did :>) >> >> 73, Guy K2AV >> >> > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > [email protected] > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
