[TowerTalk] OptiBeam OBDYA12-5 and NN4ZZ TiltPlate

[Art Greenberg]

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 at artg.tv