[TowerTalk] TowerTalk Digest, Vol 54, Issue 6

[Tadej Mezek, ve3/s51ta]

Exactly!

I think OWA is the only way to go. The only think what I am suggesting you
is to turn the elements on the bottom side of the antenna, so that snow can
not come directly on to the feeding point.
OWA's are really simple....plug and play as one would say....(They play as
calculated.....no lossy matching in between.....just wound coax cable (5-8
turns approx.) in a balun prior to mounting hot wire and ground each on one
side of the element.......

73 Ted,
ve3/s51ta

 ------------------------------
> >
> > Message: 8
> > Date: Fri, 01 Jun 2007 21:43:15 -0500
> > From: Tim Duffy K3LR <k3lr at k3lr.com>
> > Subject: Re: [TowerTalk] Yagiis
> > To: Tom Rauch <w8ji at contesting.com>
> > Cc: towertalk at contesting.com
> > Message-ID: <4660D943.16B56077 at k3lr.com>
> > Content-Type: text/plain; charset=us-ascii
> >
> > HI Tom!
> >
> > After 25 years with Gamma matches and Beta match feeds, the direct 50
> > ohm feed
> > (with a good choke) OWA Yagi is the only way to go.
> >
> > There is no decrease in gain by using a OWA design. I have carefully
> > modeled the
> > OWA vs. conventional low impedance feedpoint designs. The only draw back
> > to the
> > OWA is one additional element for a given boom length (this close spaced
> > 1st
> > director creates a 50 ohm feedpoint impedance for direct feeding and
> > great VSWR
> > bandwidth - nothing more). The gain and F/B bandwidth are not changed by
> > the use
> > of the OWA feed system design.
> >
> > 73!
> > Tim K3LR
> >
> > Just finished the last of the 4 high stack of new 20 meter 6 ele OWA
> > Yagis on 50
> > ft booms for 24 elements!
> >
> >