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Re: Feed horn for 10ft dish

At 12:31 PM 5/13/98, Christopher R. Nighswonger wrote:
>Does anyone know of a design for a 2m/70cm feed horn for a 10 foot dish?  I
>have recently acquired one and want to use it for a variety of freqs.  Please
>reply direct as well as to the mailing list as I am not yet subscribed to
>amsat-bb, only sarex.

The 1998 ARRL Handbook has a good section on EME and satellite antennas,
one of which is a parabolic dish with a 70cm helical feed.  Can't exactly
remember what the size of the dish was, although 10 feet should be plenty
for 70cm.  Waveguide-type feeds work better at much higher frequencies,
like 2.4-10 GHz.  I doubt 2 meters will be practical with a dish -- you'd
be much better off with a phased Yagi array.

P.S. There are folks receiving this mailing list (myself included) whose
mailers don't understand raw HTML.  For their benefit, please post messages
in straight ASCII if at all possible.  Thanks / 73, <BGB>

             --... ...--  -.. . -.- -.. ..... -... .. ...-
           Bruce Bostwick  KD5BIV    Austin, TX  Grid EM10DH
                Technician Class Amateur Radio Operator
      ARRL / Austin ARC / Austin Repeater Org. / Travis Co. ARES
   http://ccwf.cc.utexas.edu/~lihan/  mailto:lihan@ccwf.cc.utexas.edu
          http://www.qsl.net/~kd5biv  mailto:kd5biv@qsl.net