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echo: ham_tech
to: IVY IVERSON
from: ROY WITT
date: 1997-09-29 08:19:00
subject: High Gain Antennas for 2M

Hello Ivy.
26 Sep 97 00:22, Ivy Iverson wrote to Roy Witt:
 RW>> Some very interesting FB ratios...
 II>
 RW>>     o
 RW>>   /          top view
 RW>>  o------o-------o-------o-------o------o
 RW>>   \    DE
 RW>>     o
 II>
 II> Ah yes, the good old corner reflector... Now if you were to replace
 II> the dipole elements with a 5/8 J-pole and suitably-sized elements,
 II> mount them vertically on a boom, (about 6-8 Ft long?), I wonder what
 II> ERP you would get with about 40 Watts at the antenna, (50W xmtr)?
 II> ...Hmmm.... Not quite Moonbounce, but I'm sure it would put out a
 II> VERY respectable signal for at least 100 miles over flat terrain.  It
 II> would be a very interesting experiment!  If you are going to put it
 II> in a tower, you would probably have to mount it either at the first
 II> director ahead of the Driven Element or between there and the DE.
 II> Comments?
Build it correctly.  Mount it behind the reflector...This is about a 7.5dbd 
antenna with a much better F/B ratio than you'll find in a normal Yagi.
... Dorothy. Hate OZ, took shoes, see you in Kansas. Toto.
---------------
* Origin: KB6PI's Antenna Farm * San Diego, CA (1:202/909.10)

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