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[TowerTalk] U-bolt swivel?

To: <TOWERTALK@contesting.com>
Subject: [TowerTalk] U-bolt swivel?
From: <john@kk9a.com>
Date: Mon, 11 Jun 2007 18:44:06 -0400
List-post: <mailto:towertalk@contesting.com>
Usually I tie a rope or cable to the boom, and attach it to a  pulley on the 
mast or higher point on the tower and then bring it back down to a 
come-a-long.  I then remove the mounting u-bolts and tilt and turn the 
antenna to reach the elements on the tower.  I have single handedly adjusted 
and repaired many antennas this way including a full sized 40m and a 60' 
boom 20m beam.  When you are done with your repair, pull the boom back into 
position and replace the u-bolts.

73,
John



To: towertalk@contesting.com
Subject: [TowerTalk] U-bolt swivel?
From: "Kelly Johnson"
Date: Mon, 11 Jun 2007 10:50:53 -0700


I have a 2 element 40m yagi about 8 feet above the thrust bearing of
my crankup tower.  Working on the elements or feed is a real problem
because they are 8 feet away from the mast.  Right now, the only 2
solutions are:
   1) An aerial lift, bucket truck, cherry picker, etc.
   2) Tram the antenna down from the tower after tramming down the SteppIR
       mounted at the thrust bearing.   This is quite a bit of work and 
requires
       climbing the mast which doesn't thrill me a whole lot.

It would sure be nice to be able to swivel the yagi at the U-bolt to
allow either element to be brought near the tower/mast for
maintenance.  I've seen swivel attachments but the ones I saw didn't
look too substantial and they have very limited range.  In other
words, they wouldn't be able to get the element close enough to the
tower to avoid #1 or #2 above.

Any other bright ideas out there? 

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