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[TowerTalk] Dont use nylon zip ties on coax

Subject: [TowerTalk] Dont use nylon zip ties on coax
From: Noid Wilson <>
Date: Tue, 05 Sep 2006 09:47:08 -0400
List-post: <>
I saw a few fellas in earlier post mention nylon zip ties and coax just 
a reminder and head ups.

Relaying info from Belden and other coax manufactures. Don’t use zip 
ties, nylon or other wise and cinch them down tight. Every time you do 
that it changes the impedance by changing the diameter of the shield in 
relationship to the center conductor. If you do it on a regular 
interval, every five feet you will experience a regular spike in the 
SWR, just TDR the line and you will see. Use coax hangers-finger cuffs 
etc to support the coax. Obviously at the low bands this isn’t as much 
of an issue but above 30 megs it will be much more of an issue.

Just remember to not cinch down on the zip ties including in the 
station. Inside you can use Velcro fabric. It works great.

Noid Wilson
RF Engineer


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