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[TowerTalk] OptiBeam OBDYA12-5 and NN4ZZ TiltPlate

To: towertalk@contesting.com
Subject: [TowerTalk] OptiBeam OBDYA12-5 and NN4ZZ TiltPlate
From: Art Greenberg <art@artg.tv>
Date: Thu, 12 Sep 2024 12:18:50 -0400
List-post: <mailto:towertalk@contesting.com>
I'm considering buying the subject antenna. I want to mount it on an existing NN4ZZ TiltPlate.

The old NN4ZZ site shows an adapter for the OptiBeam square booms. In this case, the boom is 40mm square and a 2.5-inch OD aluminum tube is used as an adapter. That's all good. I can fabricate the adapter or puchase it pre-made if it is available from Degen Designs.

But I have questions about this particular antenna. Will the adapter clear the phasing lines that run under the boom sufficiently? Does the element spacing around the nominal center of the boom allow for the 18-inch TiltPlate? Will the elements nearest the mast clear the tower as it is tilted over?

OptiBeam does not make the antenna manual available without purchase, and dimensional information that would answer my questions is not available from OptiBeam (I did ask).

Does anyone here have this antenna and can provide the dimensions that I need? Even better, has anyone attempted to mount this antenna to a TiltPlate?

Thanks.
--

Art Greenberg
WA2LLN
art@artg.tv

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