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Re: Question "nesting Helix antennas" (was ) JavaScript Axial-Mode Helix Calculator



I tried this with 3 turn helixes for a 13, 5 and 3 cm feed and I could match
all of them to 50 ohms. However, the efficiency on 5 and 3 cm was less than
with waveguide feeds. It might work better on lower frequencies.

John
KD6OZH

----- Original Message -----
From: "Joe Leikhim" <jleikhim@nettally.com>
To: "Frederick M. Spinner" <fspinner@hotmail.com>
Cc: <amsat-bb@AMSAT.Org>
Sent: Sunday, 10 December 2000 21:34 UTC
Subject: Question "nesting Helix antennas" (was )[amsat-bb] JavaScript
Axial-Mode Helix Calculator


>
>
> If I wanted to build a helix for each of the bands:13cm, 23cm and 70cm.
Could I "nest" them
> together and use a single groundplane for 70cm?, Would there be any
negative interaction? I
> would use a separate feed for each.
> --
> Joe Leikhim K4SAT
> Jleikhim@nettally.com
>
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