[TowerTalk] Push Up Towers

[Jim Lux]

On 8/28/14, 6:45 AM, Chris wrote:
> Boy you're not kidding about the muscles part!  My buddy has the aluminum spidermast, and although it is well made, it is beyond difficult to push up with even the lightweight spiderbeam on top.  If you have any kind of wind it adds  downforce on the mast in addition to the existing weight and friction between telescoping sections.  My buddy came up with a jack system to push the sections up mechanically, which helped a great deal, but added complexity and extra steps to the process.
>


Do you have any details on the jacking arrangement?

And for Marko, how do you do the rotor at the bottom, and have guys?  Do 
you have some sort of bearing that the guys attach to?

> Chris
> KF7P
>
>>
>> Begin forwarded message:
>>
>> From: Marko L Myllymaki <marko.l.myllymaki at gmail.com>
>> Date: August 28, 2014 12:01:58 am MDT
>> To: towertalk at contesting.com
>> Subject: [TowerTalk] Push Up Towers
>>
>> I have had very good experiences with Spiderbeam masts.  I have two such 33
>> ft Spiderbeam heavy duty masts in ZD8 at our annual field day QTH in
>> Oct-Nov each holding A3S yagi.  I have also had one such exact setup on my
>> backyard for a year now.  You can have small rotor like smallest Yaesu 450
>> or 800 at the bottom turning entire mast.  Good workout to push it up but
>> once it is up it will stay if guyed right with good Dacron.  I use
>> Spiderbeam tripods (actually quadpod) to build and support entire system
>> while working on it (rotor, mast, antenna) and then get 4 helpers to do
>> push up (one for each guy and 2 at the base one with good muscles).  Taking
>> down is easier and I have done it by myself several times, although it is
>> probably pushing it.
>> 73 de Marko N5ZO / ZD8O
>>
>
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