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Re: [TowerTalk] Any thoughts on spider-beams?

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Any thoughts on spider-beams?
From: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 18 Jul 2016 16:02:38 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>

> And since I'm toying with getting it up an AB-577 military mast, the
> spider-beam minimal weight and size might make the process easier.

Erecting a Spiderbeam on an AB-577 is not easy.  The antenna would need
to be built from a 6' - 10' step ladder or work platform/scaffold - the
"spider" sets three to four feet above the rotator and the minimum
height of the AB-577 is about eight feet. A Spiderbeam can not be assembled on the ground and then lifted into place on top of the
rotator either.  I gave up on trying to install a 20-17-125-12-10 HD
Spiderbeam on my AB-577.  The only way one might make it work is to
use a device like the N4ZZ Hexlock <http://www.nn4zz.com/hexlock.html>
to assemble the Spiderbeam with the AB-577 base horizontal, winch up and guy the AB-577 base then raise the mast normally.

> I'm especially curious if the shipping cost is going approximate the
> cost of the antenna?

Not even close ... contact the US distributor for Spiderbeam.  They
ship UPS from Tennessee.  I'd be surprised if the shipping amounts to
even 10% of the cost of the basic triband kit.

> Eventually I will want a light-weight 40 meter 2 element.
> But that may be more than I can chew as my first attempt.

Due to the longer spreaders, the "WARC" Spideerbeam or a 2 element 40
meter antenna will be even more difficult to raise with the AB-577.

73,

   ... Joe, W4TV


On 7/18/2016 11:31 AM, dw wrote:
I'm toying with the idea of making my first lower-band beam a
spider-beam.
From what I can see on their web-site, the lowest band they support is
30 meters.
Eventually I will want a light-weight 40 meter 2 element.
But that may be more than I can chew as my first attempt.

So I'm toying with the idea of starting out with their 30 meter beam kit
because its only 28 pounds and turning radius of 20 feet.
And since I'm toying with getting it up an AB-577 military mast, the
spider-beam minimal weight and size might make the process easier.

Does anyone have any experience with the Spider-beams?
I'm especially curious if the shipping cost is going approximate the
cost of the antenna?

Thanks
N1BBR

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