[amsat-bb] Re: 10' Dish available
kq6ea at pacbell.net
Mon Oct 16 07:50:04 PDT 2006
Bob, Your creativity *never* ceases to amaze me!
73, Jim KQ6EA
--- Robert Bruninga <bruninga at usna.edu> wrote:
> > Wow, Gunther! That is a lot of antenna. How are
> you going
> > point that monster?
> > Remember, once you can hear the noise floor of the
> transponder, then
> > additional gain is, well, not needed very much,
> let's say
> > >With the coming of the next group of HEO
> satellites I am
> > >checking if there is any interest in a 10'
> Weingard mesh
> Having collected old 10' dishes myself (with no
> applications), I can add these comments too:
> 1) The dish is "overkill" for the simple reason,
> that AMSAT
> would not be designing any transpondrs that would
> "require" that
> kind of gain, otherwise very few people could use
> the satellite.
> SO AMSAT designs for smaller more practical size
> dishes, lets
> say up to 1 meter or maybe 4 feet or so in size.
> 2) But this means that the 10' dish can uaually be
> broken up
> into 4 quadrants and 4 reasonable sized amateur
> radio dishs can
> result. Being 1/4th the size and 1/4th the mass, it
> is easier
> to build a mount and tracking system. And the
> quadrant will
> work just as well as any other approximate 1 meter
> antenna with
> the proper feed.
> See my web page (near the bottom) on the subject:
> Bob, WB4APR
> Sent via AMSAT-BB at amsat.org. Opinions expressed are
> those of the author.
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