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Re: [TowerTalk] OptiBeam OBDYA12-5 and NN4ZZ TiltPlate

To: "Jon Zaimes, AA1K" <jz73@verizon.net>, towertalk@contesting.com
Subject: Re: [TowerTalk] OptiBeam OBDYA12-5 and NN4ZZ TiltPlate
From: Art Greenberg <art@artg.tv>
Date: Tue, 17 Sep 2024 08:07:58 -0400
List-post: <mailto:towertalk@contesting.com>
Thanks Jon, but the OB9-5HD isn't the antenna in question.

The XR5 is a nice antenna but based on advertised performance, its not in the same class as the OBDYA12-5.

--
Art Greenberg
WA2LLN
art@artg.tv


On 9/17/24 07:42, Jon Zaimes, AA1K wrote:
DXE has the manual: https://static.dxengineering.com/global/images/technicalarticles/dbo-ob9-5hd-p.pdf?_gl=1*1i6yvzt*_gcl_aw*R0NMLjE3MjY1NzI2OTAuRUFJYUlRb2JDaE1JeHFiY3V2REppQU1Wd2t0X0FCMmlTQ190RUFBWUFTQUFFZ0tfbF9EX0J3RQ..*_gcl_au*NTkwNzUxMTc1LjE3MjY1NzI2ODk.*_ga*MTkzMDI1NjAxOC4xNzI2NTcyNjkw*_ga_NZB590FMHY*MTcyNjU3MjY4OS4xLjAuMTcyNjU3MjY4OS42MC4wLjA. <https://static.dxengineering.com/global/images/technicalarticles/dbo-ob9-5hd-p.pdf?_gl=1*1i6yvzt*_gcl_aw*R0NMLjE3MjY1NzI2OTAuRUFJYUlRb2JDaE1JeHFiY3V2REppQU1Wd2t0X0FCMmlTQ190RUFBWUFTQUFFZ0tfbF9EX0J3RQ..*_gcl_au*NTkwNzUxMTc1LjE3MjY1NzI2ODk.*_ga*MTkzMDI1NjAxOC4xNzI2NTcyNjkw*_ga_NZB590FMHY*MTcyNjU3MjY4OS4xLjAuMTcyNjU3MjY4OS42MC4wLjA.>

<https://static.dxengineering.com/global/images/technicalarticles/dbo-ob9-5hd-p.pdf?_gl=1*1i6yvzt*_gcl_aw*R0NMLjE3MjY1NzI2OTAuRUFJYUlRb2JDaE1JeHFiY3V2REppQU1Wd2t0X0FCMmlTQ190RUFBWUFTQUFFZ0tfbF9EX0J3RQ..*_gcl_au*NTkwNzUxMTc1LjE3MjY1NzI2ODk.*_ga*MTkzMDI1NjAxOC4xNzI2NTcyNjkw*_ga_NZB590FMHY*MTcyNjU3MjY4OS4xLjAuMTcyNjU3MjY4OS42MC4wLjA.>Or
 consider the similar XR5 from JK Antennas, which has wide gap in middle to allow for 
side mounting or in your case tilt plate. And round boom, no adapter needed. Great 
support too.

https://jkantennas.com/xr5. <https://jkantennas.com/xr5.html>


73/Jon


Jon P. Zaimes, AA1K

Tower climber for hire

http://www.aa1k.us/ <http://www.aa1k.us/>


Reviews of AA1K tower work on eham website: http://www.eham.net/reviews/detail/12922 <http://www.eham.net/reviews/detail/12922>

*/Hug your favorite tower every day, and always stay connected to it./*


On Thursday, September 12, 2024, 12:19 PM, Art Greenberg <art@artg.tv> wrote:

    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 <mailto:art@artg.tv>

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