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Re: OmniDirectional Antenna



Matt:

The TPM's aren't omni-directional - just fixed in elevation.  Don't want to
get anyone's hopes up about an omni antenna.  Most new satellite ops want to
try using ground planes and such..they keep looking for the "right" omni
antenna.

73,
Dennis C. Morris
WA4ZJJ
----- Original Message -----
From: Jon Ogden <na9d@mindspring.com>
To: Matt Donohoe <TheRelic@dingoblue.net.au>; <amsat-bb@AMSAT.Org>
Sent: Friday, September 29, 2000 7:47 AM
Subject: Re: [amsat-bb] OmniDirectional Antenna


> on 9/29/00 3:17 AM, Matt Donohoe at TheRelic@dingoblue.net.au wrote:
>
> > I have built one of Jerry (K5OE)'s TPM II's... Awesome antenna, picked
up
> > SunSat on a 7 degree max el pass better at some points than my 12 El
Yagi....
> > Was wondering if anybody had any other designs that were
> > as good, I am really anxious to build another Omni.
>
> I doubt an omni is ever going to be better than the main lobe of the 12 El
> Yagi.  What you probably were seeing is that the bird was in a side lobe
of
> the yagi or you didn't track it accurately.
>
> A Yagi with it's main lobe pointed at the bird will 100 times out of 100
> times destroy an omni with performance.
>
> 73,
>
> Jon
> NA9D
>
> -------------------------------------
> Jon Ogden
> NA9D (ex: KE9NA)
>
> Member:  ARRL, AMSAT, DXCC, NRA
>
> http://www.qsl.net/ke9na
>
> "A life lived in fear is a life half lived."
>
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>

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