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Re: [TowerTalk] STEPPIR - 40 M Option - boom rotating

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Subject: Re: [TowerTalk] STEPPIR - 40 M Option - boom rotating
From: "Mike, K6BR" <>
Date: Thu, 25 Oct 2007 15:16:17 -0700
List-post: <>
Hi Keith,

I have the same set up here, just wondering how much wind you have.  We get
40 - 50 MPH from time to time and I have had no problems, the winds we have
are usually gusts.  I am wondering if the clamp part of the U bolt (I forgot
the name) has spread out from 90 degrees.


-----Original Message-----

Hi - I am a new subscriber to the list.  I just put up a 3 el Steppir with
40M option.  I have had a problem with the boom rotating in the wind - the 
elements move out of vertical with a side wind load.  This isn't a very
antenna and I am a little surprised there would be a problem. On the surface

it seems the windload of the 40M looped elements is too much for two u-bolts

on a 1 3/4" boom.  

Any idea how much I can torque the two boom u-bolts before I either crimp
boom or stretch the u-bolts?  I lubed the threads as recommended in the

This antenna replaces a Bencher Skyhawk whose boom broke in last winter's
storm.  The Skyhawk could have used a boom truss, but that is another story.

Thanks for any insight.


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