Short - 40

[KI4PAQ]

I thought I would post another one of my antenna design, this antenna works as a 2 element yagi on 40 meter. I have built this antenna and cut it for the middle of the band and it works great, you can cut it for what ever part of the band you want. I used 1/2 inch fiberglass rods for elements and top rail fence pipe for boom, and for the elements I used 17 gauage electric fence wire, the total weight was no more then 15 - 20 pounds. I hope you enjoy this one, Iam always thinking of idea's for antenna's so if you have any suggestings or idea's please share. I used the formula 468/freq for my driven element, and used a insulator to brake the element, and made the refelector 5% longer. Thanks for looking, and if any question feel free to ask...Enjoy.

[PD7MAA]

Excellent idea !
How did you match the low Z at the feedpoint ?
This could be an interesting design for a 20 m portable antenna aswell.
It look's like a Hexbeam.

73 John

[K4SAV]

I used the formula 468/freq for my driven element, and used a insulator to brake the element, and made the refelector 5% longer.

When I did that and put it on an 18 ft boom, with maximum element supports of 10 ft 8 inches on either side of the boom, the antenna resonated at 8.39 MHz with an impedance of 13.7 ohms and the free space gain was 0 dBi.

How about putting the rest of the dimensions on the picture so people won't have to guess. What are the lengths of the diagonal wires? Was the wire wrapped around the element supports or just run along its length? Do you have any measured or calculated data for this antenna?

Jerry, K4SAV