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Re: [TowerTalk] Crappy LMR600

To: Sean Waite <waisean@gmail.com>
Subject: Re: [TowerTalk] Crappy LMR600
From: Michael Clarson <wv2zow@gmail.com>
Date: Thu, 24 Aug 2017 10:03:32 -0400
List-post: <mailto:towertalk@contesting.com>
Critters love the taste of PVC. They pretty much leave PE jackets alone.
--Mike, WV2ZOW

On Thu, Aug 24, 2017 at 9:55 AM, Sean Waite <waisean@gmail.com> wrote:

> My only problem with the jefatech LMR400 flex that I have outdoors is that
> my local squirrels really like the taste of the jacket.
>
> 73 de WA1TE
>
> On Thu, Aug 24, 2017 at 3:26 PM Keith Dutson <kdutson@sbcglobal.net>
> wrote:
>
> > Yes, that is what I intended to say.  Upon reading again, it is not
> clear.
> >
> > I have used LMR-600, two pieces, on my 150 foot tower.  It worked great
> on
> > 20 and 40 meters, for about two years.  However, over time my
> installation
> > failed, and both cables ended up slipping out of their connectors.
> > Examination of the cables showed water corrosion at least 6 feet past the
> > connectors.  I line near Houston, Texas, where the tower is often
> subjected
> > to hurricanes and tropical storms.  So, my experience if far from
> ordinary,
> > especially compared to arid climate
> >
> > I learned about the long-life capabilities of Heliax hard line from Frank
> > W3LPL, at Contest University.  He posed the question something like "Who
> > would like to have an antenna farm designed to last 30 years."  Of
> course,
> > all hands went up.
> >
> > Turns out that lightning is also a major factor here.  A close strike
> feeds
> > secondary arcs to the tower and coax cables.  These arcs can penetrate
> the
> > coax jacket, creating pin holes that allow water intrusion.  Heliax is
> not
> > ruined by this intrusion.
> >
> > 73, Keith NM5G
> >
> > -----Original Message-----
> > From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
> > Steve
> > Maki
> > Sent: Wednesday, August 23, 2017 8:04 PM
> > To: towertalk <towertalk@contesting.com>
> > Subject: Re: [TowerTalk] Crappy LMR600
> >
> > I must be misunderstanding you Keith.
> >
> > I thought you said that copper hardline is the ONLY cable that can
> survive
> > outdoors for extended periods.
> >
> > -Steve K8LX
> >
> >
> >
> > On 8/23/2017 15:13 PM, Keith Dutson wrote:
> >
> > > That cable is good as gold when used properly.  Anything other than
> > > solid copper jacket hardline used outside, with proper connection
> > > waterproofing is eventually going to have weathering problems that
> allows
> > water intrusion.
> > > That kills performance.
> > >
> > > 73, Keith NM5G
> > _______________________________________________
> >
> >
> >
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