[TowerTalk] beam antenna truss

[Bryan Swadener]

Steve,
 
My F12 C-4XL specified steel wire rope.  The yagi came
to me used, and the wire rope was thoroughly rusted. 
Rather than second-guess the manufacturer, I replaced 
it with 19 strand stainless steel wire rope, and the 
yagi works fine.  The hardware is all SS & aluminum.
There are eyebolts through the boom, etc.  As I have 
a half wavelength 10m vertical on top just above the 
truss wires, the truss wires serve as radials on 10m.
 
If you elect to use nonconductive support, Phillystran 
or polyester (aka Dacron®) is fine but so is Nylon.  
I've used the latter for decades to support wire 
antennas. Double-braided construction minimizes 
stretch, and Nylon stands up well to sunlight.
 
I think we can all agree that electrogalvanized 
steel should not be used.
 
vy 73,
Bryan WA7PRC

> Date: Sun, 23 Dec 2012 19:50:22 -0500 (EST)
> From: Steve W1DXH
> Subject: [TowerTalk] beam  antenna truss
> 
> Looking for info on best way to truss a long boom yagi.
> What is the best material to use? How to secure to
> boom etc. Thanks for help.
> 
> 73,
> Steve W1DXH