[amsat-bb] Re: Stacking satellite antennas on top of an HF beam howmuch separation?

[Art McBride]

Michael
At least 1/2 wave for the lowest frequency (38" 2M) if both antennas are
mounted in the same polarity. Nothing if crossed polarity (like arrow
Antenna)

Art,
KC6UQH

-----Original Message-----
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of Michael Tondee
Sent: Monday, April 12, 2010 4:17 PM
To: amsat-bb at amsat.org
Subject: [amsat-bb] Stacking satellite antennas on top of an HF beam howmuch
separation?

I'm trying to get a Cushcraft  MA5B HF mini beam back up in the air.
What I'd like to do is  use my azimuth rotator to rotate it and mount my
elevation rotator and Homebrew 2M and 70CM "cheap yagis" up above it on
the same mast. Aside form the obvious distance it will take to keep the
VHF/UHF array from hitting the HF array during elevation changes, what
is a rule of thumb for separation distance to keep the two systems from
interacting with each other? Like so many things, this is something I
used to know but seem to have forgotten in my old age.
  Tnx and73,
Michael, W4HIJ
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