The KLMs came out in the late 60s or early 70s. They worked well for
antennas of the day. I had 5L on 20 and 6L on 15. Mine "appeared" to
have gain, or were at least directive. IIRC they used dual DEs and were
quite broad banded. I had a 7L Wilson on 10 that played very well.
Even on that cycle low, I could hear JAs on an apparent dead band. It
was fed with a quasi air core coax. It had a spiral dielectric that
looked like layers of thin polystyrene. .They didn't use software as
there wasn't any except on mainframes and mini computers and it was
EXPENSIVE as was computer time. Programs, even at the college level
were input with punch cards.
73
Roger (K8RI)
On 11/5/2016 Saturday 11:42 PM, Jim Thomson wrote:
Date: Fri, 4 Nov 2016 19:08:01 -0600
From: "Doug Renwick" <ve5ra@sasktel.net>
To: "'AA6DX - Mark'" <aa6dx@arrl.net>, "'TT'"
<towertalk@contesting.com>
Subject: Re: [TowerTalk] Duo band 20/15 meter beam
Some of us remember Wilson antennas. Wilson sold aluminum and if their
antennas had any significant gain you were fortunate.
Doug
## Wilson interlaced arrays never did work. The higher freq portion was always
a dud.
They didnt use software to design em..fubar, nor did they factor in the
myriad of swages.
On their 20-15 duobanders, the 15 was a dud. On their 15-10 duobanders, the
10 was a dud.
## If you want a real laff, model some of these old yagis in modern software.
Including telrex,
with their equal spaced eles. The results were none too good.
Jim VE7RF
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73
Roger (K8RI)
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