[Towertalk] 40m directional antennas

[David L. Thompson]

Sounds like the K8UR array described by K3LR and others over the past few
years.  I use one K8UR dipole for 80 that seems to get the DX.  Down on most
local signals. Mine is mounted on a big tree but a tower can be used.   An
array of 4 would work well as noted.  But remember like the 4 square these
are arrays of 2 phased antennas.  The K8UR looks like a vertical when
modeled.
Dave K4JRB

> I believe N4ZR either has or had one of these on 80.
>
> ----- Original Message -----
> From: "jljarvis" <jljarvis@abs.adelphia.net>
> To: <towertalk@contesting.com>
> Sent: Monday, March 18, 2002 5:26 PM
> Subject: [Towertalk] 40m directional antennas
>
>
> >
> > From what I can see, a 2 el 40m yagi will yield 4.5dBd at best,
> > with a f/b ratio that is well less than 20dB.  Azimuth beamwidth
> > is on the order of 85 degrees.
> >
> > By comparison, a 'spitfire' array.... 4 sloping dipoles, folded back
> > toward the base from the feedpoint, gives 4.5dBd, 20dB f/b, instant
> > directional change, and substantially reduced cost.  Azumuthal
> > beamwidth is also in the 85 degree vicinity.
> >
> > Has anybody modelled these things?
> >
> > N2EA
> >
> >
> >
> >
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