[TowerTalk] Swinging gate antenna mounts

[Mike Ryan]

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 at 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 at 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 at 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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