I used the ARRL Antenna Manual and found a "window" of lengths that matched my
purposes... 28 feet seemed to work to avoid resonance on the HF bands. That
length is reasonably long enough so that you aren't breaking up the lengths of
the guys "too" much. It took me about 6 hours of work for a set of three guys
to break them up. 18 hours total for a 100 ft. tower. The clamps and the
insulators were a little expensive. But now I know that no matter what HF
antenna I might put up in the future - I shouldn't have interaction with the
guys.
Randy
N0LD
On Thu, 1 Aug 2002 14:41:30 +0300 =?Windows-1252?B?VPVubm8gVuRoaw==?=
<tonno.vahk@mail.ee> wrote:
I guess it also depends on what antennas you have on the tower. If just one
monobander then it would be fairly easy to find nonresonant leghts of EHS
guy wires with modelling. But if tribanders etc.. then they will effect some
band one way or the other.
That's my conclusion after a lot of modelling. Having tribanders and 40m
Yagis on the tower I know that I could never sleep peacefully not seeing
terrible nightmares about those lost db-s if having solid EHS wires. And
breaking them up into smaller lengths than half wl on 10m is making the
project as expensive as Kevlar already and more troublesome...
73
Tonno
ES5TV
----- Original Message -----
From: "Mike Morrell" <K8KE@arrl.net>
To: <Towertalk@contesting.com>
Sent: Wednesday, July 31, 2002 11:02 PM
Subject: [Towertalk] Kevlar Guys
Ok guys start your engines....this reflector has convinced me to " guy " my
30' Rohn 25G tower project vs, free-standing.
The next question: other than higher first costs, does using Kevlar guys
have advantages over EHS or PhillY?
73 from Mike K8KE
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