On Sep 11, 4:02*am, Jon Kåre Hellan wrote:
writes:
On Sep 10, 10:29*pm, Art Unwin wrote:
No. The shoebox size antenna would approximate an isotropic if it did
radiate. It would still have to be placed at the focal point of a very
large parabola due to the size of the wave length. Such an antenna, I
believe, on the island of Puerto Rico (the SETI antenna) although it
is currently used primarily as a receiving antenna. That parabola is
positioned to have a very high radiation angle and might not be be
that good for terrestrial DX.

I believe that hams once were allowed to use Arecibo for EME on 80m.

I wonder what the used at the focal point. Assuming a yago directed to
the center was impractical, next best choice would be a full wave loop
(in my opinion).