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Re: Feeding 1.2 meter offset dish for AO-40



Nice feed Peter, where did you find this dish??

G. Beat
----- Original Message ----- 
From: "Pieter Ibelings" <elpieter@hotmail.com>
To: <amsat-bb@AMSAT.Org>
Sent: Sunday, July 15, 2001 6:56 PM
Subject: [amsat-bb] Feeding 1.2 meter offset dish for AO-40


> Guys,
> 
> Based on the radiation requirements and helix calculations by Howard 
> G6LVB, I have designed a copper tape helix for the 1.2 meter dish. I 
> decided to use 4.5 turns initially. The focal point is placed about 
> 0.7 inches from the ground plane. I am going to give the antenna a 
> try in a couple of minutes on AO-40. Here are some of the pictures.
> 
> http://www.ozoni.com/n4ip/offset.html
> 
> Pieter
> 
> 
> ----
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> 

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