Fw: Re: [TowerTalk] How can this be?
wa4dou@juno.com
wa4dou@juno.com
Mon, 10 Apr 2000 08:47:12 -0400
--------- Forwarded message ----------
From: wa4dou@juno.com
To: towertalk@contesting.com
Cc: towertalk@contesting.com
Date: Sun, 9 Apr 2000 05:42:28 -0400
Subject: Re: [TowerTalk] How can this be?
Message-ID: <20000409.054235.-970531.0.wa4dou@juno.com>
Hi Josh and Gang,
I share your enthusiasm for your new antenna and the fine results you
are experiencing with it.
What i am about to write will, no doubt, invoke the ire of some.
Directive
antennas, like all antennas, are magic. Radio and propagation via the
ionized layers surrounding the earth,likewise, is magic. I have old radio
and antenna books that go back into the 30's and 40's. The basic
underlying
principles were well understood, even then. There have been no radical
changes in the theory underlying antennas, nor have there been any
radical
changes brought about by discovery of new types of antennas that perform
"magically" in relation to all the known types of antennas, heretofore.
The "Raibeam" is no exception.
Its gain is comparable to that of a 2 element yagi, i.e., in the 4-5
dbd range.
Its elevation angle is governed by the height above ground. It may excell
in the
area of front to back ratio when compared to a 2 element yagi. The fine
results
you are experiencing with yours, is attributable solely to radio
propagation. Any
well designed 2 element yagi, substituted in place of the Raibeam, would
achieve
the same results.
Amateurs love to believe in magic. Sales departments thrive on touting
the
"magic" virtues of their products. If any manufacturer were to have found
magic
and created truly outstanding antennas that put all others to shame,
there would ,
in a very short time, only be one manufacturer, OR, one product,
manufactured
by many. It hasn't happened.
73 Roy WA4DOU
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On Sun, 9 Apr 2000 08:59:38 -0600 "sparks" <sparks@cptnet.com> writes:
>
> Just wanted to share a novel ANTENNA experience
> - I recently bought a 2 el 20m RAI beam - this is
> monoband yagi on 7 foot boom! I have temporarily
> installed it at 18 ft above ground in a tiny tight river
> valley in New Mexico. The nearby hills are above the
> yagi. It uses a novel phasing delay design - both elements
> see power. Anyway at 100w output I have been "running'
> Europe on 20m - with 3 to 6 callers often responding.
>
> I have been pounding cw for over 40 years -
> I have operated at some of the biggest contest stations -
> Worked DXCC on 4 bands each in a weekend -
> and I have to say I am very impressed with these RAI beams
> made by Chuck Smith WA7RAI down in Phoenix.
>
> I know that everyone is 599 some where some time !!
> but despite this - I am very impressed with this 16 pound
> yagi - I have no commercial interest in RAI beam of any kind
>
> Josh N7XM
>
>
> --
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>
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