[TowerTalk] Ideal 40m Wire Antenna

[jaw@lion.cc]

Dear OM Tim !

I had a 60 feet guyed mast with a 5 element yagi (20/15/10) on top of it some years ago. For 40 Meters I built a 4 element sloping dipole using this mast a a support. Of course it was necessary to change the guylines from metallic ropes to some nonconductive material.

The Antenna itself was 4 (shortened) dipoles spaced at 90 degree. Part of the feedline (coax) is used to make one element the driven element and the other three to work as reflectors. So you get good directivity and a verly low angle of radiation without the need of an extensive radial-system. By flipping a switch you can instantly change direction, which proved to be very usefull in contests.

I used a quarterwave-vertical before and the 4 el sloper was really an improvement.

I described this antenna in Ham-Radio-Magazine. If you would like to get more information, just send me your address and I will ship you a copy of this article. Some information on such an antenna can also be found in the ARRL-Antenna Handbook.

73s

Juergen - OE5CWL

> 
> Von: "Tim Makins,  EI8IC" <ei8ic@eircom.net>
> Datum: 2001/09/26 Wed PM 07:25:04 CEST
> An: "Antennas" <antennas@qth.net>
> CC: "TowerTalk" <towertalk@contesting.com>
> Betreff: [TowerTalk] Ideal 40m Wire Antenna
> 
> 
> Gentlemen,
> 
> Assume you have a guyed 80' mast (not a tower).
> 
> What would be the best wire antenna you would put on it, for 40m Dxing ?
> 
> Tim, EI8IC
> 



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