[TowerTalk] Opinions on AB-621 Installation

[Joe Subich, W4TV]

Given the junctions between sections of the AB-577, I would not extend
the mast above the top support point (bracket or buys) with any antenna
load more than a small (VHF yagi or vertical).  AB-577 and AB-621 are
designed to be guyed at the top and several points along the exposed
length.  They are not like an MA-40/MA-550 which are self supporting
with the correct base.

73,

    ... Joe, W4TV


On 8/15/2013 5:30 PM, Ed G wrote:
> Hi Folks,
>       I am helping design an antenna installation for a semi-restricted
> community (they allow antennas that extend no more than 10 ft above the
> roofline).  I believe something like the US Tower MA-40 small crankup mast
> with a small yagi would be allowed.  But instead of the MA-40 mast, I'm
> wondering if I could use an AB-621 or an AB-577, with a concrete base
> similar to what I'd use for the MA-40, and a house bracket (again - similar
> to what I'd typically use on the MA-40).  The antenna would be something
> like a KT34M2, which is 40 pounds with a 4.5 sq ft windload.  The mast would
> be extended about 40 feet, and a house bracket designed to fix the mast to
> the house at about the 20 ft level.
>      Has anyone tried this application for the 621 or the 577?  With the
> proper size base and house bracket, and small yagi, I am not proposing any
> guy wires.   Thoughts?
> --Ed, N3CW--
>
>
>
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