[TowerTalk] positive pull down for Tri-ex towers

[Craig Clark]

>Date: Wed, 09 Jul 2008 17:14:58 -0500
>From: chasm at texas.net
>Subject: Re: [TowerTalk] Tri-Ex WT-51 Electric Winch with Pulldown
>         Mechanismand RMC-1000
>To: towertalk at contesting.com
>Message-ID: <48753862.40502 at texas.net>
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>Dan Hearn wrote:
> >   I think it is foolhardy to raise or lower a crankup when you are not
> > watching it and in control of the operation. I have had a coax 
> snag and pull
> > in two even when I am watching but not as observant as I should be.
> >   73, Dan, N5AR
>
>Could not agree more.  still not sure why a pulldown is necessary as
>gravity should certainly handle it

Yes................maybe.

I had a Triex W-67 and found that when the tower was fully extended, 
the top section would bind during a "pull down" and not retract. The 
top cable would go slack and the section would not lower.

I solved it by cobbling up a positive pull down with a length of 
aircraft cable attached to the bottom of the top section, a pulley at 
the base and my come-a-long. I would tension the top section and 
lower. Re-tension and then lower
a bit more.

All installations are different. I attributed mine to the top section 
"tilting" a bit when extended even thought the installation was plumb.




73, Craig Clark, K1QX


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