[TowerTalk] 80 Meter beam

jimlux jimlux at earthlink.net
Fri Mar 31 11:41:32 EDT 2017


On 3/31/17 8:10 AM, Ed Sawyer wrote:
> Martin.  I have a 2 el wire beam on a 36 ft boom.  It is "kick a%&".  What I
> did to solve that problem is dual drive the elements - 180 deg out of phase.
> Then just switch matching stubs at the bottom of the tower.  It is only a
> few tenths of a dB lower in gain than an optimized 2 el Ref - DE
> arrangement.  You can do all the tuning, switching at the feed point
> combiner at the bottom of the tower, and you have the advantage that it is
> bi-directional.  From W1, that means it's a USA and EU antenna all at the
> same time.
>
>

basically a W8JK?  forms a beam in both front and back directions? (and 
can be quite narrow beam, if the two elements are "close")



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