Skipp, I wonder if the antenna you "stole" this idea from was the Hy-Gain GPG-1
high band ground plane antenna we used to use in the late '60s and early '70s.
The dc ground was a real feature of this simple antenna.
Sure wish I could remember how they connected the feedline to this antenna. I
recall there was an SO-239 on the mounting plate, but I don't recall how they
attached the other end to the Beta match.
--- On Mon, 2/22/10, skipp025 <skipp...@yahoo.com> wrote:
From: skipp025 <skipp...@yahoo.com>
Subject: [Repeater-Builder] Re: Ground Plane and Dipole Diatribe
To: Repeater-Builder@yahoogroups.com
Date: Monday, February 22, 2010, 12:57 PM
> allan crites <wa9...@...> wrote:
> Skipp
> I sure would be interested in what your version of a beta
> matched gnd plane antenna which results in a 50 Ohm match
> looks like.
It looks just like a standard 1/4 ground plane, single vertical
radiator, three (typical) horizontal elements perpendicular
to the vertical element.
The Vertical Radiator is 5% shorter than the horizontal elements.
At the base of the vertical radiator an 1/8 inch Aluminum Rod
is attached with screw hardware and extends out perpendicular
for X-inches (length of the Beta depends on the frequency of
intended operation), then bends down for a a few inches followed
by another bend and return rod length back toward the antenna
base mount (ground) where it is attached (grounded) with another
screw nut hardware combo. It's that simple...
> Could you, would you, provide us with a description or
> picture to satisfy my curiosity?
> Thanks,
> a.
Satisfying your curiosity is a daunting task... I didn't
think the Beta Match up, I lifted or stole the idea from a
commercial antenna product I purchased back in the 1970's.
You can model this antenna using EZNEC if you have a copy. I
found a public domain version is supplied with the ARRL Antenna
Handbook (on the included CD) if you have one.
Age sometimes has its rewards...
s.
