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[Towertalk] Coax opinions

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Subject: [Towertalk] Coax opinions
From: (Kevin Hemsley)
Date: Wed, 7 Aug 2002 10:35:10 -0600
I like LMR400 and I have used LMR600 for a longer runs. I use buryflex up
the tower and for rotor loops.

Steve Katz"< wrote:

> They cannot be cable-tied with metallic or nylon tie wraps; they
> cannot be securely clamped; they they should all be gently
> supported in several locations along a 150' run.

This is the first that I have ever heard of not cable tying LMR400. LMR400
is pretty tough stuff. You would need an extremely tight cable tie to crush
the dielectric. I'm not sure it's even possible to tighten a nylon cable tie
enough to make a dent in LMR400. Most wire ties are not installed
bone-crushingly tight, so it would greatly surprise me if this were an

We've installed tens of thousand of feet of LMR400 using cable ties and I've
never seen a problem. I searched Google and the Times Microwave site and
couldn't find any mention of the limitations you list. Do you have a
reference that describes the problems associated with using wire ties with
LMR400 cable?

Kevin Hemsley

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