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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