[TowerTalk] THHN wire problem
Pete Smith
n4zr at contesting.com
Wed Oct 24 08:20:36 EDT 2007
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 at contesting.com
>[mailto:towertalk-bounces at contesting.com] On Behalf Of Jim Lux
>Sent: Tuesday, October 23, 2007 5:49 PM
>To: Dennis OConnor
>Cc: towertalk at 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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