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Fw: [Towertalk] Low dipoles

To: <towertalk@contesting.com>
Subject: Fw: [Towertalk] Low dipoles
From: alwilliams@olywa.net (Al Williams)
Date: Tue, 5 Nov 2002 09:47:03 -0800
----- Original Message -----
From: "Al Williams" <alwilliams@olywa.net>
To: <Sent: Tuesday, November 05, 2002 8:28 AM
Subject: Re: [Towertalk] Low dipoles


>
> >
> >     A novel east coast idea via K3LR years ago is to put a reflector
wire
> on
> > the ground under the low dipole. Cheap and easy way to get some more dB
in
> > the air.
> >
> > Cheers,
>
>
> From time-to-time this idea is floated, but does it have merit?
>
> First, Earth is said to be a pretty good reflector.
>
> Second, EZNEC reports for a half-wave 68' dipole 30' high at 7.04 mhz:
>
> no reflector           perfect ground             7.93 dbi  straight up
>
> 70' refl on gnd             "                               7.93   "
>
> no reflector           real ground (.005)       6.39   "
>
> 70' refl on gnd             "                               6.58   "
>
>
> 73 k7puc
>


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