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

[Richard Smith]

Many thanks to all who responded to this request for ideas. For the first couple of yagis, I'm going with the DX Engineering Boom Brackets. Other suggestions were also very good and I will keep them in mind for future builds.
73, Rich, N6KT


    
----- Forwarded Message -----
 From: Richard Smith <n6kt1 at sbcglobal.net>
 To: Towertalk Reflector <towertalk at 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)

  
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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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