W7EL wrote:

I made Chuck an offer a while back, as follows: That if he has the
Raibeam tested at a certified antenna range and the results show a
free-space gain of at least 5.5 dBd (7.65 dBi) with simultaneous 25 dB
or greater f/b ratio, I'll pay the test fee. This is performance less
than he claims and less than he claims his model shows. But so far he
hasn't taken me up on the offer.


Ken, K7GCO got bunch of RAIbeams and put them up, wrote glowing review for 73
Mag. He was impressed with the performance and wanted to figure out why is it
so. He very carefully inserted dimensions into EZNEC model and could not get
agreement. He had to go down to 48. 5 MHz in EZNEC to obtain similar pattern
and parameters as real antenna resonant at 51.25 MHz.

So, maybe modeling doesn't "see" the dual driven elements and critical coupling
well? It is amusing to see the "experts" defending unmistakability of software
(loading coil case etc.)

Yuri, K3BU.us
can we all get alone?