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Re: Topband: no response to query: feeding phased verticals at half wave

To: Dale Long <dale.long@prodigy.net>
Subject: Re: Topband: no response to query: feeding phased verticals at half wave spacing
From: Guy Olinger K2AV <olinger@bellsouth.net>
Date: Tue, 22 Nov 2011 20:45:45 -0500
List-post: <topband@contesting.com">mailto:topband@contesting.com>
There is no single spacing for phased elements.  There is a continuous
variation of both spacing and phasing which has a gazillion outcomes.
Two antennas spaced a halfwave apart and fed 180 degrees out of phase
are only one configuration that will exhibit an end-fire pattern.

The answer to seeing the nearly infinite variability to antennas,
spacing and phasing is called EZNEC or one of the other antenna
modeling programs. It's the first place to go to see what stuff will
do.  EZNEC is a particularly good modeling program and well worth the
cost. The help section in it is very extensive, and exceptionally well
written in a format that makes it completely searchable.  It has a
start easy section that is as good as stuff like that ever gets.

73, Guy.

On Tue, Nov 22, 2011 at 9:16 AM, Dale Long <dale.long@prodigy.net> wrote:
> Gentlemen:
>
>
>
> I am not one who thinks the whole world revolves around my concerns.  And I
> recognize that some research on my part may be necessary. ( I have read
> ON4UN's Low-Band Dxing)
>
>
>
> But I do think this is a reasonable question, and think that there are
> knowledgeable folks who might provide some advice.  Unfortunately I have
> never done any antenna modeling.
>
>
>
> Please let me know your thoughts.
>
>
>
> Thanks,
>
>
>
> Dale N3BNA
>
>
>
> From: Dale Long [mailto:dale.long@prodigy.net]
> Sent: Saturday, November 19, 2011 3:05 PM
> To: 'Topband@contesting.com'
> Subject: feeding phased verticals at half wave spacing
>
>
>
> Gentlemen:
>
>
>
> I have been told repeatedly that phased verticals should be spaced 1/4
> wavelength apart.  Ok, I am willing to accept that.
>
>
>
> My question is if you have verticals that are 1/2 wave apart, would it not
> give some pattern, whatever that should be?
>
>
>
> If you were looking for an endfire pattern how should you feed such
> verticals?
>
>
>
> If you have specific questions, you may contact me directly at
> dale.long@prodigy.net
>
>
>
> Thanks and 73,
>
>
>
> Dale N3BNA
>
> _______________________________________________
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>
_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK

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