Re: [TenTec] [SMC] OT: Half inch Andrews Heliax LDF4-50A vs LMR-400

["Bob McGraw - K4TAX" <RMcGraw@Blomand.net>]

One cause, typical thermal expansion and contraction caused by heating and 
cooling.  The line strapped to the tower will have a different temp 
coefficient due largely to its black jacket while the tower which is steel 
and basically white.
73
Bob, K4TAX


----- Original Message ----- 
From: "Barry N1EU" <barry.n1eu@gmail.com>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Friday, April 26, 2013 3:35 AM
Subject: Re: [TenTec] [SMC] OT: Half inch Andrews Heliax LDF4-50A vs LMR-400


> On Fri, Apr 26, 2013 at 1:36 AM, GARY HUBER <glhuber@msn.com> wrote:
> > I read a piece about
> > coaxial cable shields with aluminum foil and braided copper, repeated
> > flexing, and moisture which destroys the aluminum and is a diode action
> > noise source.
> If you're not using it for the rotor loop, I don't see why a coax run
> would be subjected to ANY, let alone repeated, flexing.
>
> Barry N1EU
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