[TowerTalk] 3" Boom Joints

[Dave Johnson]

Go to a scrap metal yard and see if you can find a 2 1/2" schedule 40 
aluminum pipe.  It's OD will be 2.875".  Cut off some pieces 8 to 12 inches 
long (your choice) then make a single cut long ways.  Put a hose clamp 
around the pipe and squeeze it.  Slide half of it inside your 3" boom 
sections.  You will need to move the hose clamp a couple of times then take 
it off and bump the sections together.  I put a 1/4" stainless bolt through 
both boom sections at each joint.  All of my 54' booms are made like that.

Dave - K4SSU



----- Original Message ----- 
From: "Andre Van Wyk" <kr5dx at yahoo.com>
To: <towertalk at contesting.com>
Sent: Tuesday, September 22, 2009 7:18 PM
Subject: [TowerTalk] 3" Boom Joints


>I am planning the construction of 2 yagis, and I was wondering about "of 
>the shelf" material to join 3" aluminum tube sections for very long booms.
>
> Any suggestions would be appreciated.
>
> 73
> de KR5DX
>
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