[Antennaware] Multi- bobtail curtain

[S. J. Blackwell]

Thanks Guy and Pierrer
I am going to go ahead with the bobtail. The real question I had was whether 
the phasing could be maintained properly when feeding the two bobtails with 
the the usual tapped parallel ckts. I had thought that at resonance the 
phase shift would not be a problem if the tuned ckts on both elements were 
similar and at the same resonant frequency. I still have not figured out how 
to model this on EZNEC, but hope to evenyually do so. Stiil low on the 
learning curve.

TNX es 73,
Sam W5LU

>
>Today's Topics:
>
>    1. Multi-bobtail curtain (Guy Olinger, K2AV)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Mon, 1 May 2006 22:44:55 -0400
>From: "Guy Olinger, K2AV" <olinger at bellsouth.net>
>Subject: [Antennaware] Multi-bobtail curtain
>To: <antennaware at contesting.com>
>Message-ID: <00a601c66d92$66c22490$0600a8c0 at swift>
>Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>	reply-type=original
>
>Posted on behalf of F3WT
>
> > De : F3WT <ars.f3wt at wanadoo.fr>
> > Date : 30 avril 2006 14:13:38 HAEC
> > ? : antennaware at contesting.com
> > Objet : [Antennaware] Multi- bobtailcurtain
> >
> > Sam,
> >
> > Have you got any reply on this already?
> > From all I read so far, quita few books ( incl. ARRL antenna ) and
> > simulating antennas ( EZNEC),
> > I would suggest following
> >
> > for question 1:
> > Yes it should be possible ( by resonnating directrr to somewhat
> > below frequency (-5% or so) or refelector above by 5% )
> >
> > for question 2:
> > resonnate ( tune ) bothe elements on same frequency seperately
> > ( will include reciproqual influences ). Then feed them with a
> > Collins splitter
> >  Element one at 0?, element 2 at 90?. Try also 180? ( Dr Kraus ,
> > W8JK).
> > Plan to do this with my to  parallel antennas.
> > Have done similar test on an XJK antenna ( sort of a butterfly,
> > W8JK like horizontal crossed loop arrangement with very good
> > results waiting still t.b. published.)
> >
> > Hope I have helped.
> > 73.
> > Pierre.
> > F3WT
>
>
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>End of Antennaware Digest, Vol 34, Issue 1
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