TIP: Click on subject to list as thread! ANSI
echo: ham_tech
to: IVY IVERSON
from: ROY WITT
date: 1997-10-03 09:28:00
subject: High Gain Antennas for 2M

Hello Ivy.
03 Oct 97 00:59, Ivy Iverson wrote to Roy Witt:
 II> R  DE D  D Do you REALLY want a 2M "cannon"?
 RW>> Nope. I work UHF, exclusively.
 II>
 II> AH.  No HF either?
TS-520 stored in a box since 1985...
 II>> Have the J-poles paired, above AND below the mast!
 II>> Also, what difference would it make if the corner had a screen
 II>> instead of duned reflectors?
 RW>>
 RW>> tuned? round? ??
 II>
 II> Rectangular... a classic V-shaped "corner."
 II>
 The screen will give you a higher F/B ratio.
 II>> This would require a non-metallic mast unless it were rear-
 II>> mounted, but if the DE's were properly phased and everything
 II>> optimized (resistors in the directors, etc?).
 RW>> Why would it require a non-metallic mast?  Because of the
 RW>> J-pole?
 II>
 II> If the J-poles were vertically arranged both above and below the
 II> boom...
 II>
 II>> ..  That just MIGHT be hot enough for moonbounce if it were
 II>> mounted on AZ-EL rotors! (It would also be about 15 Ft high and
 II>> quite heavy with a lot of wind resistance!)
 II>
 RW>> And more trouble than it's worth...:)
 II>
 II> Perhaps... but fun (for me) to contimplate... and it could be
 II> scaled for any higher frequency.
Let me know when you get it working, I'll build one for UHF..
... Hi, I'm Chip. Micro Chip. Eight-o-three-eighty-six!
---------------
* Origin: KB6PI's Antenna Farm * San Diego, CA (1:202/909.10)

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