| |
G8MNY > TECH 29.09.24 07:31l 74 Lines 3604 Bytes #999 (0) @ WW
BID : 16940_GB7CIP
Read: GUEST
Subj: 2m 4el Quad you can build
Path: IZ3LSV<I0OJJ<GB7CIP
Sent: 240929/0623Z @:GB7CIP.#32.GBR.EURO #:16940 [Caterham Surrey GBR]
From: G8MNY@GB7CIP.#32.GBR.EURO
To : TECH@WW
FOUR ELEMENT QUAD - FULLERTON RADIO CLUB
It is supposedly equal to a Cushcraft 11 element beam.
LR 21" per side LT 20.51" per side
84.1" total 82.04" total
Diagonal length 29.73" Diagonal length 29.01"
_________________________ _________________________
|. .| |. .|
| . . | | . . |
| . . | | . . |
| . . | | . . |
| . | | . |
| . . | | . . |
| . . | | . . |
| . . | | . . |
|_________________________| |_________________________|
LD - 1, 19.9" per side LD - 2, 19.7" per side
79.6" total 78.8" total
Diagonal length 28.14" Diagonal length 27.82"
_________________________ _________________________
|. .| |. .|
| . . | | . . |
| . . | | . . |
| . . | | . . |
| o | | o |
| . . | | . . |
| . . | | . . |
| . . | | . . |
|_________________________| |_________________________|
The antenna boom is made out of schedule 40 pvc pipe, 1"size, which is 1.5"
In diameter, actual size. The boom is approximately 42" long. The cross
pieces are 1/4 inch bicycle flag poles mad out of fibreglass, or you could
use fibreglass fence posts.
TOP VIEW LOOKING DOWN
LR LT LD-1 LD-2
Vertical Polarisation Feed Point
|
V
_ _ _ _
| | | | | | | |
| | | | | | | |
| | | | 1" PVC T | | | |
| | | | | | | | |
_|_|__________________|_|_________________|_|_________________|_|_
|__o____________________o_______|_|_|_______o___________________o__|
| | | | |_| | | | |
| | | | | | | |
| | | | | | | |
| | | | | | | |
|_| |_| |_| |_|
| <-----16.1"------> | <----12.4"------> | <-----12.4"-----> |
0.2 wavelength 0.15 wave length to build
YOU FEED A QUAD FROM THE HORIZONTAL SPREADER END.
How about some more homebrew projects with illustrations on packet radio. I
would be interested in reports from anyone who builds this antenna.
Good luck & I will look forward to your comments.
73 de Doug, KI6DS @K6RAU-1
Why don't U send an interesting bul?
73 De John, G8MNY @ GB7CIP
Read previous mail | Read next mail
| |
