Towertalk
[Top] [All Lists]

Re: [TowerTalk] Black coax (again)

To: Tom Osborne <w7why@frontier.com>
Subject: Re: [TowerTalk] Black coax (again)
From: Mickey Baker <fishflorida@gmail.com>
Date: Wed, 15 Sep 2010 20:41:18 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
He  

Mickey Baker
NetApp
Mobile: 954 729 6464

On Sep 15, 2010, at 7:52 PM, "Tom Osborne" <w7why@frontier.com> wrote:

> BlankHi All
> 
> I recently took some 75 foot sections RG-8X coax off of a pair of 40 meter 
> verticals and found the center and shield was all black.  I mentioned it 
> here and some said it was from water ingress.
> 
> I was playing with these pieces of coax yesterday and found that if I cut 5 
> feet off the antenna end, the shield was nice and bright, but the center 
> conductor was all black.
> 
> I took the coax fittings off at the shack end and found the same thing--the 
> shield was nice and shiny, but the center conductor was all black, so there 
> is no way it could be from water.  Also, the antennas are lower than the 
> house so the water couldn't run up hill through the bulkhead to the antenna 
> switch.  The connectors are Amphenol.
> 
> The center conductor is stranded, and each strand is all black.  I would 
> assume that the wires are all insulated from each other due to the 
> discoloration.  It almost looks like the wire got hot, but I only run 500 
> watts into matched antennas, so the SWR shouldn't be a factor.
> 
> What, besides water, would turn the center conductors black?  73
> Tom W7WHY
> 
> _______________________________________________
> 
> 
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________



_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk

<Prev in Thread] Current Thread [Next in Thread>