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[Towertalk] OWA Yagis

To: <towertalk@contesting.com>
Subject: [Towertalk] OWA Yagis
From: Mark <AA6DX@arrl.net> (Mark)
Date: Sat, 13 Jul 2002 22:43:08 -0700
Lots of folks have a problem with the Classic beams having a longer driven
element VS the reflector .. due to the feed via coax inserted into the
driven element.  I do not see a REAL loss of gain via this method .. in the
"real world" ... Loved my 5 el mono 20M, 46` boom .. which, I had to leave
in Alaska .. became a true sourdough.   Soured on Alaska, no dough to get
out!
73 ---- Mark  6dx
----- Original Message -----
From: <n4kg@juno.com>
To: <TOWERTALK@contesting.com>; <kk9a@arrl.net>
Sent: Saturday, July 13, 2002 10:03 AM
Subject: Re: [Towertalk] OWA Yagis


> Generally speaking, the higher the gain, the lower the
> Feed Impedance for a split dipole feed.  When antennas
> are tuned to produce a 50 Ohm feed, they give up some
> gain.  The TA33 is a 'classic' example of this.  That's why
> all the HyGain beams have Beta Matches, to step up the
> low feed impedance to 50 ohms.
>
> Tom  N4KG
>
> On Sat, 13 Jul 2002  <kk9a@arrl.net> writes:
> > Does anyone have any experience with the OWA design yagis.  Is there
> > any advantage other than low SWR and direct 50 ohm feed?  I modeled the
>
> > 15m 6el X 36' boom and compared it to my DX Engineering 15DX-6 with the
> same  boom length and the DX Engineering had more gain throughout most
> of the  band.
> > Are there losses in the DX Eng. hair pin match or higher SWR that
> > would make the OWA come out on top?
> >
> > 73,
> > John
> >
> >



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