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