[TowerTalk] [Bulk] Re: antenna choices for K4XS

[Joe Subich, W4TV]

On 2015-04-12 2:56 PM, David Blake via TowerTalk wrote:
> and I on the other hand would suggest you look 1st for a used
> Mosley. With only Mosley yagi's I am #1 Honor Roll (all 340 DXCCs)
> and total DXCC confirmed 352. Looking at the ARRL Mixed DXCC list I
> don't find  K7LXC at any level

K7LXC and N0AX published two widely respected *scientific* studies
of tribander performance using validated measurement techniques to
directly compare the performance of the tested antennas against a
standard (dipole).  These were field tests not some modelling exercise
that failes to capture real world losses in the antenna design.

In those tests, the Mosley antennas TA-33, PRO-57B and PRO-77 were
the *worst* performers in their respective (small and large tribader)
categories.  The TA33 averaged less than 1 dB gain compared to a dipole
on 20 meters and less than 1.5 dB gain compared to a dipole on 10
meters.  The PRO57B and PRO77 both averaged less than 1 dB gain
compared to a dipole on 20 meters and more than 1 dB *LESS* gain
compared to a dipole on 10 meters.

The small tribander group typically showed 3 dB on 20 meters and 4 dB
on 10 meters vs. a dipole while the large tribander group typically
showed 4+ dB on 20 meters and 5 - 6 dB on 10 meters.

Enjoy your Mosely ... I'm also on the DXCC Honor Roll (CW and Mixed)
and my only antennas are a 20-10 meter dipole at 20 feet, an R5
(vertical) with base at 20 feet, and a 160-40 meter trapped inverted V
with apex at 40 feet.  As has been said many times - anything that
radiates will make QSOs.

73,

   ... Joe, W4TV