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Re: [TowerTalk] collapsible/foldable booms

To: "Tower and HF antenna construction topics." <>
Subject: Re: [TowerTalk] collapsible/foldable booms
From: "Dave Johnson" <>
Reply-to: "Tower and HF antenna construction topics." <>
Date: Sat, 13 Feb 2010 19:57:17 -0500
List-post: <">>
Have a look at .  I am very pleased with the Yagi in 
the bag.

Dave - K4SSU

----- Original Message ----- 
From: "jimlux" <>
To: "Towertalk Reflector" <>
Sent: Saturday, February 13, 2010 6:34 PM
Subject: [TowerTalk] collapsible/foldable booms

> I'm looking at some ideas for a portable yagi, and I'm looking for
> something to use as the boom in lengths from 20-40 feet.  It needs to be
> "stowable" in something, say 4 feet long (like a golf bag), and not too
> heavy.  Something that needs "trussing" for rigidity is ok (because,
> after all the boom has to support the element weights, so basically it
> needs decent compression strength, without buckling)
> Light weight would be nice too.  The surplus 4' military mast sections
> run about 2.7 pounds/4', so a 20 foot set would be 13-14 pounds.  That
> seems a bit bigger than I'd need, so if I could get down to the 5-8
> pound range, that would be nice.
> The spiderbeam uses 1.15 m long fiberglass tubes, 35mm in diameter, so
> it's in the same general size as the aluminum mast sections ( a bit
> smaller..), they're about the same price as aluminum tubes.
> So, any other clever ideas out there?  I'd love to be able to nest the
> tubes, because it gets to be quite a bundle.
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