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[TowerTalk] Fw: Boom Truss Clamp (Collar, Sleeve?)

To: Towertalk Reflector <towertalk@contesting.com>
Subject: [TowerTalk] Fw: Boom Truss Clamp (Collar, Sleeve?)
From: Richard Smith <n6kt1@sbcglobal.net>
Reply-to: Richard Smith <n6kt1@sbcglobal.net>
Date: Wed, 28 Feb 2018 02:00:14 +0000 (UTC)
List-post: <mailto:towertalk@contesting.com>

I hope both links come thru this time.
     
----- Forwarded Message -----
 From: Richard Smith <n6kt1@sbcglobal.net>
 To: Towertalk Reflector <towertalk@contesting.com> 
 Sent: Tuesday, February 27, 2018 5:55 PM
 Subject: Boom Truss Clamp (Collar, Sleeve?)
   


I'm involved in planning a station on PJ4, in which some yagis will be large 
enough that a boom truss support will be needed. I would like to find a clamp 
made of aluminum for connection to the aluminum boom. I'm hoping to find a 
clamp that is all aluminum, or mostly aluminum (small amount of stainless steel 
hardware, none in direct physical contact with the boom). I have had some of my 
own experience, and have seen photos, of installations where a Stainless Steel 
or Galvanized Steel U-Bolt, Muffler Clamp, or bracket was used for attachment 
of a truss to a boom. Dissimilar metal (galvanic action) at the attachment 
point caused weakening of the boom, sometimes to the point where the boom broke.
I have been searching online for a while and the links below show clamps that 
are kind of close to, but not quite matching, my idea of an aluminum boom clamp 
for this application:
TETRIX® MAX Tubing Coupler (W39379)

  
|   |

 
http://www.leetackle.com/clampaccessories.html

If anyone has already solved this design challenge, I would appreciate if you 
would share the details.

Thanks and 73,
Rich, N6KT







   

   

   
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