[amsat-bb] Re: Good mobile antennas to use

Bob Bruninga bruninga at usna.edu
Wed Sep 14 15:37:10 PDT 2011


1/4 wave simple 19.5" whip is ideal not only for VHF, but also has almost 7
dBi gain on UHF above 25 degrees.  So it performs very well on high
elevation passes.

Any mobile gain antenna optimized for mobile operation will, by definition,
perform worse for satellites than the raw 19" whip.

See http://aprs.org/astars.html about 80% down the page discusses it.


-----Original Message-----
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of John Geiger
Sent: Wednesday, September 14, 2011 6:28 PM
Subject: [amsat-bb] Good mobile antennas to use

I am looking to get on the FM satellites while mobile and activate some
different grids.  Can anyone recommend a good mag mount dual band antenna to
use for satellite work?  Does the MFJ 1/4 wave mag mount antenna do pretty
good on the sats?  I am guessing a 1/4 wave will cover more of the pass than
a 5/8 wave would.

73s John AA5JG
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