You might be referring to a article written for QST, August 1993, by Lew
Gordon, K4VX. This article is found in the ARRL publication, Yagi
Antenna Classics. Using NEC, he models a 109' tower carrying two large
yagi's, one at 54' and the other at 109'. The tower is constructed with
conductive guys.
Quoting his conclusion, "Continuous, conductive guy wires do disturb the
patterns of antennas mounted on towers. But unless you're a purist in
pursuit of unrealistically clean side lobes, these effects are of no
practical importance."
In my area, we had a rash of vandalism, where a wacko got his jollies by
igniting (burning) the coax to a number of commercial and cell towers
including a 200' plus tower used by the Washington State police. A
local ham tower, AB7F also suffered the same fate. John suffered a bad
cut while trying to extinguish the fire.
These happenings really got me wondering would I want synthetic guys
that burn and can be easily cut!
Mike Coogan W7MGC
Vancouver, Washington
----- Original Message -----
From: "StellarCAT" <RXDesign@ssvecnet.com>
To: "tower" <towertalk@contesting.com>
Sent: Wednesday, September 21, 2005 9:17 AM
Subject: [TowerTalk] replacement guys (was ...and C31XR)
>I see phillystrand is still being hawked as the best overall solution
>for guying where antennas
> will be along the length of the tower... but I still prefer good old
> fashioned steel.
>
> The reasons - much less stretch (see K7NV's very nice analysis of same
> using both EHS and
> philly - no comparison!), no UV concerns (long term philly use is
> still not available in great even
> numbers), cost, and overall strength.
>
> As for interaction - there is a treatise on the net by a gentlemen
> that I have forgotten his name -
> very well done overall on tower installations... he said in essence:
> for a dipole to add gain one
> has to CAREFULLY place another length of conducting material in the
> plane, at the right distance,
> and have the right length to JUST have a little gain... the guy wires
> are not in the plane in most cases,
> can be cut to be non-resonant, and for the most part are a long
> distance away.
>
> I will stick with steel!
>
> g.
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers",
> "Wireless Weather Stations", and lot's more. Call Toll Free,
> 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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