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Re: [TowerTalk] Rotator Replacement in LM354 Question

To: JON ZAIMES <jz73@verizon.net>
Subject: Re: [TowerTalk] Rotator Replacement in LM354 Question
From: Larry Schulman <k9iqbikes@gmail.com>
Date: Thu, 7 Sep 2023 15:16:53 -0500
List-post: <mailto:towertalk@contesting.com>
Rob:

I don't have a solution for you, but once you get this resolved, you might
want to consider getting the Tasjian/Tri-Ex tilt-over jig.  I owned the
same tower and was able to easily service the antennas and rotator 8 feet
from the ground. If you do consider purchasing the correct tilt-over jig,
make sure you review the tower distance to other objects and the base
orientation.  The diagrams on the Tashjian site shows that the tower pivots
at an elevation 8 feet above the ground.  I have one that I could offer
you, but it is in the Chicago area.  Sorry I can't be of more help.

Larry-K9IQ

On Thu, Sep 7, 2023 at 2:37 PM JON ZAIMES via TowerTalk <
towertalk@contesting.com> wrote:

> 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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