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Re: [TowerTalk] Rotator Replacement in LM354 Question

To: Rob <Rob@drumon.com>
Subject: Re: [TowerTalk] Rotator Replacement in LM354 Question
From: JON ZAIMES via TowerTalk <towertalk@contesting.com>
Reply-to: JON ZAIMES <jz73@verizon.net>
Date: Thu, 7 Sep 2023 15:36:52 -0400
List-post: <mailto:towertalk@contesting.com>
I would brace it. I use three kayak tie-down straps or a couple of 
https://www.dxengineering.com/parts/dxe-mastlock
> 73/Jon
>  
> Jon P. Zaimes, AA1K
> Tower climber for hire
> Felton, Delaware
>  
> http://www.aa1k.us/
> Cell: 302-632-2353
>  
> Reviews of AA1K tower work on eham website: 
> http://www.eham.net/reviews/detail/12922
>  
> Hug your favorite tower every day, and always stay connected to it.
>  


> On Sep 6, 2023, at 3:48 AM, Rob <Rob@drumon.com> wrote:
> 
> Hi Group,
> 
>   I need to replace the TailTwister rotor. It is about 3 feet down from the 
> top. My antenna stack consists of a 20 foot 2" CM mast with a 4 element 
> SteppIR at about 15" above the top plate with a 13 element 2m beam up several 
> feet and topped with a 27 element 70cm beam which weigh very little. So most 
> of the weight is the mast and SteppIR which I figure is around 200 pounds. To 
> replace the rotor, I need to lift the mast up a couple inches to lift it off 
> the top of the rotor.
> There are 2 plates at the top of the LM354 spaced about 6" apart tied 
> together with a 6" tube that the mast slides through and is slightly larger 
> in diameter than the 2" mast so it is fairly snug.
>   So my question is that if I were to pull up the mast, and removing the 
> rotor clamp, will the 6" tube be rigid enough to keep the stack from leaning 
> too far from vertical? My hope is that since the majority of the weight is 
> near the top of the tower, there is not an excessive amount of force to want 
> to tilt it over. Is that what this tube is designed for?
>   Or is this not strong enough and I need to design a temporary bracket of 
> some sort or maybe nylon straps around the mast and each leg just above the 
> rotor to keep it centered?
> 
> Thanks,
> Rob K6DQ
> 
> it won't want to
> 
> 
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