[TowerTalk] Duo band 20/15 meter beam

[Roger (K8RI) on TT]

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 at sasktel.net>
> To: "'AA6DX - Mark'" <aa6dx at arrl.net>, "'TT'"
> <towertalk at 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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