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G8MNY  > TECH     11.05.22 07:32z 74 Lines 3604 Bytes #23 (0) @ WW
BID : 21374_GB7CIP
Read: GUEST
Subj: 2m 4el Quad you can build
Path: SP7YDD<SR1BSZ<IW0QNL<ON0AR<OZ5BBS<CX2SA<N9PMO<VE3KPG<GB7CIP
Sent: 220511/0727Z @:GB7CIP.#32.GBR.EURO #:21374 [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


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