[TowerTalk] Tashjian LM470 review requested

[Paul Playford]

On my LM470 the thrust bearing alignment is moderately critical.  I align it
to the center of the tube at the top of the tower by eyeballing the thrust
bearing in, tighten the screws and the rotating the mast (no rotator) and
check for binding.  If it still binds I readjust the thrust bearing.  Trial
and error until the mast does not bind.

And then I removed the rotator, installed a wood plate on the bottom side of
the rotator mounting plate, lowered the mast until it rests on the wood
plate and drew an outline of the mast on the wood plate.  I even moved the
mast around on the plate to find where the rotator center wanted to be.
Then I used the new center to remount my rotator.

No binding now with stacked long boom monobanders for 10, 15 & 20 meters.
T2X rotator.



----- Original Message ----- 
From: <gdaught6 at Stanford.edu>
To: <towertalk at contesting.com>
Sent: Wednesday, October 15, 2003 6:02 PM
Subject: Re: [TowerTalk] Tashjian LM470 review requested


> On 15 Oct 2003 at 13:24, RWMaylott at aol.com wrote about Kashjian towers:
>
> Well, I got a TriEx while the name still existed.  (Maybe the last one!?)
>
> > I have had two problems of note:
> > 1.  Although I have not heard of anyone else with this problem, I have a
> > problem with the mast binding.  I have "good" rotation over only about
180
> > degrees, despite numerous attempts to correct the problem (including
getting an extra
> > internal thrust bearing from Tashjian).  Don't know whether the top pipe
may
> > be a little out of plumb, or whether the "floating" rotor mount used in
this
> > design are contributing.
>
> I have about 8 feet of mast in the top section of my tower; no problems.
>
> > Another consideration is that there is no means of adjustment on the
base,
>
> Test-fit the tower to the base.  It would be much easier to adjust before
installation
> than after!  (Mine was fine!)
>
> > I spent an extra grand to hire a concrete contactor to dig the hold and
> > ensure that the base got installed plumb.
>
> I dug my own hole with my 65-year-old body.  The top bits of the base,
where the
> tower actually attaches,  was prefabricated.  I found it really easy to
build a jig that
> held the completed base in place and plumb.  We checked it during the pour
> (pumped concrete) and it was no trouble keeping it plumb.
>
> I don't know if the Kashjian towers are the same, so YMMV.
>
> 73,
>
>
> _______________________________________________
>
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>
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