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Re: Topband: two phased verticals for 160 m

Subject: Re: Topband: two phased verticals for 160 m
From: "Rick Karlquist" <>
Date: Mon, 1 Jun 2009 11:42:01 -0700 (PDT)
List-post: <">>
> Hello
> Some time ago I was asking comments obove mentioned 2 phased verticals 1/8
> wave spacing. Thanks for all about comments.
> Now I ask your help, what is the best way to feed two 160 verticals 3/8
> wave spacing. Accoding books 90 decree phasing works even f/b would not be
> very good. Would parasitic work better ?
> 73  ! Kari OH5LF

I did a lot of modeling of 3/8 wave spacing.  It is not
very useful for a 2 element array.  I determined that
for 3/8 wl spacing you need 7 elements as described here:

Even at 7 elements, this array still has some sidelobes.

If you could put a 3rd element midway between your two elements,
so that you have 3 elements with 3/16 wl spacing, then you would
get a really good pattern, if you drive the center element with
2 times the current of the outer elements, and use 135 degree

Rick N6RK

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