Re: [amsat-bb] Quadrafiliar helix feed for 2.4 GHz?

["John Stephensen, KD6OZH" <kd6ozh@xxxxxxx>]

Unless you have a 0.2 F/D dish, I think that a quadrifilar feedw ould
producee too wide a beam.  A single helx of 3-5 turns should work with most
F/D ratios. A cupped reflector will cut down on sidelobes. Check the W1GHZ
web site for feed information.

73,

John
KD6OZH

----- Original Message -----
From: "Mike Murphree" <n4cnw@knology.net>
To: <amsat-bb@AMSAT.Org>
Sent: Sunday, 20 May 2001 03:16 UTC
Subject: [amsat-bb] Quadrafiliar helix feed for 2.4 GHz?


>
> Has anyone worked out the dimensions for a quadrafiliar helix
> that could be used for a S-band dish feed?
>
> I have some surplus .070 semirigid coax to work with...
>
> What kind of bandwidth could I expect from it?
>
> Thanks,
> Mike N4CNW
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