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Re: S-band Helix Feed wire diameter



I used 3/16" copper tubing. It holds its shape with no supports and you can
flatten and drill one end to solder to an N or SMA connector. The flattened
tubing mounted on 0.090" of Teflon sheet makes a 50-ohm microstrip line so
matching is easy.

73,

John
KD6OZH

----- Original Message -----
From: "Bill Acito" <w1pa@hotmail.com>
To: <amsat-bb@AMSAT.Org>
Sent: Friday, 01 June 2001 19:52 UTC
Subject: [amsat-bb] S-band Helix Feed wire diameter


> Is there any advantage/disadvantage in building a helix dish feed from
> 1/4" copper pipe
> rather than 10 or 12 gauge wire at 2.4GHz? I was thinking it might
> make the helix to N-connector
> interface a bit "nicer", and a bit stiffer overall.  If I keep the
> radius the same (measure to the center of the pipe), should it work
> just as well?
>
> "Nicer" means I could drill a hole through the end of the pipe where
> it should mate to the N-connector center pin, slide it over the pin,
> and solder.
>
> Bill
> W1PA
>
>
> ----
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>

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