Ah, there is a possibility. I hadn't thought about using guys as inverted V
sky wires. In order to not have the angle of the wires too vertical and
still not have to place the guy anchors really far out from the tower I
could change the angle of the guy with vertical guyed poles. I helped a
neighbor install a G5RU and we put two 10 ft lengths of chain link top rail
together to keep the end of his wire antenna higher above ground. We guyed
the 20 ft support poles with black Dacron antenna rope but could have used
wire had we needed more strength.
Thanks,
73
Patrick AF5CK
-----Original Message-----
From: RMorris
Sent: Tuesday, April 30, 2013 4:48 PM
To: Patrick Greenlee
Subject: Re: [TowerTalk] Non resonant guy considerations
Make the top set of guys a 40 and 80 or 20 inverted V.
Sent from my iPad
On Apr 30, 2013, at 16:10, "Patrick Greenlee" <patrick_g@windstream.net>
wrote:
August gentlemen of the elevated antenna mounting structures fraternity, I
would like some technical advice (and anecdotal reports are also solicited
as well) regarding the necessity/effects of breaking up the guys for a
tower used for VHF and UHF into non resonant lengths. The subject tower
is a tilt-over/crank-up tower consisting of two 20 ft sections and a tube
mast at the top to gain back the length lost to overlap and have antennas
mounted at least 40 ft AGL
This tower is intended for use only to support VHF and UHF antennae but
may have a non conductive connection (black Dacron antenna rope) to assist
in holding up a wire antenna or portion thereof in the HF bands. Any
thoughts on how far the antenna wire needs to be from the VHF and UHF
antennas. HF and VHF/UHF will not be in use simultaneously.
At some point as freq goes up breaking up the guys into ever decreasing
lengths is not standard practice, e.g. microwave and cell towers. So, any
advice as to approximately about where in freq this "happens" for ham
bands? Yeah, I know, how high is up and how long is a ball of string...
TIA for your consideration and 73 de
AF5CK Patrick
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