Dan, I had a 150ft Rohn 45 stick when I lived in Manassas, Va back in the
late '90s. There was a 4 x 4 x 4 stack of HyGain 204ba antennas on the
tower with two side mounted and the third just over 160ft and above a 3 ele
40m beam that was on the tower top. I used two of the IIX Industries side
mounts with Ham IV rotators. The side mounted antennas were mounted in such
away that the little bit of lost rotation was in a direction least likely
aimed. The spacing of the guy wires and avoiding resonant lengths to me is
more important than trying to avoid a convenient spread of the ground level
guy points to aim the antennas through, but that's just me. I think the
antennas were spaced where the guy points on the tower were spread apart to
some extent rather than every 30ft for example so that the rotation was
clear. Once you know just where you want to put the antennas on the tower
as far as spacing is concerned I think you can plan on where to attach the
guys points and their end result on your pattern, directions, etc. Good
luck with it. - Mike
-----Original Message-----
From: Stan Stockton
Sent: Wednesday, May 29, 2013 12:58 PM
To: Dan Atchison
Cc: towertalk@contesting.com
Subject: Re: [TowerTalk] Swinging gate antenna mounts
Dan,
I think you would be happy with guying the tower at approximately 225
degrees, 345 degrees and 105 degrees and having the rotator sit off the leg
that is in the 105 degree direction. Assuming you have enough room between
the boom to mast plate and the nearest element you should be able to cover
what you want and maybe even ZL. I believe you need at least the distance
from the center of the vertical mast to the outside point of the farthest
leg of the tower. Depending on how you mount the rotator 24 inches should
be good for 45G, for example.
73...Stan, K5GO
On Wed, May 29, 2013 at 11:20 AM, Dan Atchison <N3ND@aol.com> wrote:
Stupid question, but I want to make sure I'm visualizing this correctly.
I'm planning a new tower installation that will include a swinging gate
antenna mount somewhere down the tower. Antenna rotation desired is on
this mount is CW, 270 through 180 degrees . Based on experience, what's
the best way to configure the tower's guy location/direction?
73,
Dan
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