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Re: [TowerTalk] THHN wire problem

To: "Robert Carroll" <w2wg@comcast.net>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] THHN wire problem
From: Pete Smith <n4zr@contesting.com>
Date: Wed, 24 Oct 2007 08:20:36 -0400
List-post: <mailto:towertalk@contesting.com>
Mine started shedding the clear coating after less than a year, but the 
black insulation is still good after 6.  YMMV.

73, Pete N4ZR

At 06:28 PM 10/23/2007, Robert Carroll wrote:
>I used solid THN in NJ for various wire antennas which were up for years
>with no sign of deterioration.  Then I moved to the Atlanta area and put up
>a DZepp for 40m about two years ago.  There has been deterioration in that
>antenna.  Strands of what I thought were insulation were hanging down form
>it, but did not seem to affect it.
>
>Recently I had it down and found that it was not actually insulation which
>was hanging down.  It was some sort of clear coating which had been applied
>over the colored insulation.  There was no sign of cracks or breaks in the
>colored insulation, but maybe that will follow soon.
>
>73
>Bob W2WG
>
>-----Original Message-----
>From: towertalk-bounces@contesting.com
>[mailto:towertalk-bounces@contesting.com] On Behalf Of Jim Lux
>Sent: Tuesday, October 23, 2007 5:49 PM
>To: Dennis OConnor
>Cc: towertalk@contesting.com
>Subject: Re: [TowerTalk] THHN wire problem
>
>Dennis OConnor wrote:
> > The green oxidation is from water intrusion, not from the jacket...
> >   It causes no harm for use as a radial...  Keep on transmitting...
> >
> >   denny / k8do
> >
>
>Water and some chloride or carbonate salt, perhaps?
>
>Copper Oxide is either black or red (depending on which one), but those
>chlorides, sulfates, carbonates, etc tend to be blue or green.
>
>
>
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