[TowerTalk] 80 Meter beam

john nistico electric911inc at hotmail.com
Fri Mar 31 11:33:21 EDT 2017


I use a 3 element spaced 53 ft between elements. I use vacuum relays to add or subtract my cw jumper 

Sent from my iPhone

> On Mar 31, 2017, at 11:10 AM, Ed Sawyer <sawyered at earthlink.net> 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.
> 
> 
> 
> 73
> 
> 
> 
> Ed  N1UR
> 
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