In a message dated 9/9/2009 10:45:11 A.M. Pacific Daylight Time,
towertalk-request@contesting.com writes:
> I'm contemplating my first guyed tower with side-mounted antennas.
> What sorts of planning tools do people use to determine if the antennas
of
various turning radii will clear guy wires?
Stan, W7NI, used to have a website that had a sidemount calculator on it.
I wasn't able to find it in a precursory look but it still might be there
somewhere.. Try contacting Stan directly at _w7ni@easystreet.com_
(mailto:w7ni@easystreet.com) .
> In my planning efforts I'll be contemplating several "what if" sorts of
questions. I think I can do this with (a lot of) graph paper and a spread
sheet and some basic trig, but I'm hoping for something that might be more
visual.
My experience was that you need a minimum of 31" between elements
(e.g, TH7) in order to get it to turn around 45G with a swinging gate
sidemount. Calculations for distance to guys is a little more involved but
I've
used graph paper with reasonable results. I think you have some guy wire
challenges so my suggestion is to go with 4L antennas - good performance
from a 2 stack and lots of room between the elements simplifying the
sidemounting.
Cheers,
Steve K7LXC
TOWER TECH
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