[TowerTalk] Wilson 5 element 20 meter monobander

[RICHARD BOYD]

I think it depends on what the "extra" element is doing.  If it's close to 
the DE as in WA3FET's OWA designs (used by K3LR and others), as I heard 'FET 
and 'LR note in the Dayton Antenna Forum talk on their 4-el 40, the "first 
director" is really a part of the DE, as they described it, more of a 
"parasitic driven element..." you end up with kind of a "log cell" feed of 2 
elements, though they're not hardwired together as they would be in a 
traditional log cell.

I totally accept your argument, and K3LR's note that in this situation a 
4-element really should be considered to be a 3-element.

With the older even-element-spacing designs like the Telrex and others, I 
think the front to back, bandwidth, or other improvements are a little more 
illusive.

73 - Rich, KE3Q


----- Original Message ----- 
From: "Mel" <mel.martin at axare.mail.net>
To: <towertalk at contesting.com>
Sent: Sunday, October 10, 2004 11:13 AM
Subject: Re: [TowerTalk] Wilson 5 element 20 meter monobander


> >5 elements on 40 ft boom is one element to many for that boom length.
>
> I hear this all the time... Yes 48' is better but with 5 el on 40 you can
> get much better bandwidth performance than with 4 elements on the same 
> boom
> length. I think this misconception comes from the idea that you can get as
> much gain on a 40' boom with 4 elements vs 5 elements. But with 5 elements
> you can get better F/B and gain over a much broader freqency range.
> Typically, best configuration is with a close spaced first director like 
> the
> OWA antennas.
>
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