That sounds pretty close..I was very pleased with my set up and the side arm
mounts worked great. - M
-----Original Message-----
From: K8RI
Sent: Wednesday, May 29, 2013 2:35 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Swinging gate antenna mounts
On 5/29/2013 1:52 PM, Mike Ryan wrote:
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.
With the antenna mounted at a right angle to the gate with enough
clearance so the gate can swung flat against the face if the tower I
think you can get 330 degrees of rotation and not the 120 you'd expect.
I'm too lazy to work it out
73
Roger (K8RI)
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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