I have not used a 2" mast in years. At P40A I had two Yaesu G-2800DXA
rotators and my 2 1/2" aluminum mast fit into their clamp perfectly. My
prop pitch rotators have 3" masts. I am sure that other rotators also
accept larger masts.
John KK9A
To: towertalk@contesting.com
Subject: Re: [TowerTalk] FW: Mast Wall Thickness
From: "Joe Subich, W4TV" <lists@subich.com>
Date: Wed, 26 Feb 2014 09:30:17 -0500
com>
Increasing the wall size does not "increase the strength" of the
material - it reduces the stress on the mast for a given load.
Put another way it increases the load handling capacity of the mast.
In any case, it is far better to increase the diameter of the mast -
the stress in a 2.5" OD 1/4" wall mast will be only about half that
in a 2" OD, 1/4" wall mast for the same applied load. It's a shame
that the makers of antenna rotators simply don't understand that and
continue to insist on 2" mast only.
73,
... Joe, W4TV
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