[amsat-bb] Feeding 1.2 meter offset dish for AO-40

["Pieter Ibelings" <elpieter@xxxxxxxxxxx>]

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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