If I remember correctly, the HyGain Explorer 14
used "Parasleeve" (their copyrighted name for open sleeve)
10M elements for the 10M DE which resulted in improved
SWR Bandwidth on all 3 bands. The full size 10M elements
may have been stagger tuned. The center DE is full size
on 15M. On 20M, there is only one (15M) trap, which
reduces the trap loading effect compared with a conventional
DE with 10 and 15M traps. This antenna represented a
significant improvement over the more narrowband TH3.
I think a similar approach on an 18 ft boom with a separate
10M reflector with a trapped 15/20 reflector and 10/15/20
director would be make a nice 'medium' sized tribander.
Tom N4KG
On Mon, 27 Jan 2003 "Faber, Andy L." <andy.faber@berliner.com> writes:
> Robert,
> I used one for years. It was mounted at 43 ft on a rooftop mast,
> and I
> thought it worked great. It was reasonably compact and broadbanded
> enough
> to cover all three bands without a tuner. It does have traps, so
> you might
> be better off with a force 12 design (or even consider a 3-el
> steppir), but
> the Ex-14 is a very good antenna.
> GL and 73, andy, ae6y
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
________________________________________________________________
Sign Up for Juno Platinum Internet Access Today
Only $9.95 per month!
Visit www.juno.com
|