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Total 3 documents matching your query.

1. [TowerTalk] Black on Cu (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Sun, 3 Sep 2006 22:16:39 -0700 (PDT); The black is copper oxide and a poor conductor. Most common form of copper degradation. Can form deep under insulation on coax and other insulated wire. Resists soldering very well. If the color on t; /archives//html/Towertalk/2006-09/msg00122.html (7,735 bytes)
2. Re: [TowerTalk] Black on Cu (score: 1): Author: Martin AA6E <aa6e@ewing.homedns.org>; Date: Mon, 04 Sep 2006 01:39:50 -0400; I expect that using acid or abrasives to clean the wire would be more detrimental than any oxide! It would take away more copper. If you're worried about wire degradation, there's nothing you can do; /archives//html/Towertalk/2006-09/msg00123.html (7,847 bytes)
3. Re: [TowerTalk] Black on Cu (score: 1): Author: "Donald Chester" <k4kyv@hotmail.com>; Date: Wed, 06 Sep 2006 03:03:27 +0000; The copper is already green. The original wire was salvaged from old open-wire railway telegraph lines. The sulphur from years of coal-burning steam locomotives gave it a good coating of copper sulph; /archives//html/Towertalk/2006-09/msg00223.html (9,438 bytes)

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