This gain figure sounds very much like the 144MMz EME double rhombic
that was in the ARRL handbook for years. As I remember it was "attacked"
some years ago for claiming such a high gain.

I built one for 70cm some years ago and the results were disappointing,
or rather not as good as a 22 el loop quad. I didnt do much
experimenting with it sorry.

Cheers Bob VK2YQA

wrote:

I picked up a Oct 1973 issue of 73 & noticed a interesting article on
a mast mounted rotatible very

Exactly what i wanted to know, i may hold off on this one and search
for a different type high gain uhf antenna. Only problem is all
the design programs i have found on the web for yagi or log perodic
antennas are for 6-8 elements maximum, @ 900mhz i would like to have
as many elements as a boom would support. So my next question would be
where to look for a multi element beam using atleast a minimum of
twelve elements?

Scaling shouldnt be an issue so start by looking at 1296MHz antennas.
You can always computer model them as well. Have a look at Mr Cebiks'
website. (http://www.cebik.com) I'd actually recommend you look at a
corner reflector. Nowhere as critical as a yagi and pretty easy to
build. Maybe even a 3D corner?

I've been wanting to try a Sterba curtain (on 900mHz) over a planar
reflector. That wouldnt be real critical either.

Cheers Bob Vk2YQA

wrote:

Exactly what i wanted to know, i may hold off on this one and search
for a different type high gain uhf antenna. Only problem is all
the design programs i have found on the web for yagi or log perodic
antennas are for 6-8 elements maximum, @ 900mhz i would like to have
as many elements as a boom would support. So my next question would be
where to look for a multi element beam using atleast a minimum of
twelve elements?