"John Smith" wrote in message
...
I think it would be possible to alter the "beam width" of the omni-antenna
(mobile) and so make it "better."
If you take the time to learn EZNEC or MMANA you can view this for
yourself in the plot of the radiation pattern....

Regards,
John

Thanks John but that's not what I meant. For the record,
I'm trying to understand some manufacturer's claims that
the antenna they sell, while smaller than a 1/4 wave whip
on 10m, puts out a better signal.

Here are the rules:

1) The antenna is at least 25% shorter than a 1/4 w whip
2) The antenna is made with ordinary materials - no friggin gold.
3) The antenna is omni-directional & vertically polarised
4) The feedline is Flexi 4XL, aka CQ-102
5) The antenna is mounted dead center on the roof of a van.
6) The antenna's mount is non magnetic - I.E. There is a good
DC/RF ground at both the base of the antenna & the radio.

The way I see it is there is no way to make an antenna that
meets all those rules and STILL has more than 2.14dbi gain
due to resistave losses.

Am I right?

--
73's es gd dx de Ken KGØWX
Grid EM17ip, Flying Pigs #1055,
Digital On Six #350,
List Owner, Yahoo! E-groups:
VX-2R & FT-857