> Run the bottom part of the 1/2-wavelength antenna away from
> the vertical for 30 feet or so and feed it
> at the corner as an OCF vertical...
Alternatively, a J-pole making the bottom 1/4 wave out of
"ladder line." It's lighter than a coax fed vertical dipole,
the "feedline" does not need to come off at fight angles
and the bottom end of the dipole is 1/4 wave above ground
to minimize the ground losses. The negative is the need to
fly the balloon at 400+ feet.
73,
... Joe, W4TV
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of ve4xt@mts.net
> Sent: Tuesday, December 16, 2008 5:30 PM
> To: Larry Banks; TowerTalk@contesting.com
> Subject: Re: [TowerTalk] balloon supported antenna
>
>
> Or,
> Run the bottom part of the 1/2-wavelength antenna away from
> the vertical for 30 feet or so and feed it
> at the corner as an OCF vertical...
>
> Then, you have less wire to hold aloft and no feedline to hold aloft.
>
> Would make an interesting model to study.
>
> 73, kelly
> ve4xt
>
> >
> > From: "Larry Banks" <larryb.w1dyj@verizon.net>
> > Date: 2008/12/16 Tue PM 04:24:30 CST
> > To: <TowerTalk@contesting.com>
> > Subject: Re: [TowerTalk] balloon supported antenna
> >
> > And the coax should come away from the feed point at 90 degrees for
> > ~1/4
> > wave...
> >
> > 73'
> > Larry
> > W1DYJ
> >
> >
> > ----- Original Message -----
> > From: "Alex Malyava" <alex.k2bb@gmail.com>
> > To: "Bob Maser" <bmaser@tampabay.rr.com>
> > Cc: <TowerTalk@contesting.com>; <ve3gsi@canada.com>
> > Sent: Tuesday, December 16, 2008 5:17 PM
> > Subject: Re: [TowerTalk] balloon supported antenna
> >
> >
> > > He will need to use BIG baloon then...
> > > In case of vertical the workload is the radiator wire only, when
> > > dipole needs to lift good length of coax as well.
> > >
> > > On Tue, Dec 16, 2008 at 5:04 PM, Bob Maser
> <bmaser@tampabay.rr.com>
> > > wrote:
> > >> A vertical dipole require no radials as it is center fed.
> > >>
> > >> Bob W6TR
> > >> ----- Original Message -----
> > >> From: "Eric - VE3GSI" <ve3gsi@sympatico.ca>
> > >> To: <TowerTalk@contesting.com>
> > >> Sent: Tuesday, December 16, 2008 10:00 PM
> > >> Subject: Re: [TowerTalk] balloon supported antenna
> > >>
> > >>
> > >>> Gregg,
> > >>> There is a article in this January QST using a balloon loop
> > >>> antenna, I
> > >>> see
> > >>> no reason it can't be resized and used on 160 meters.
> It might be worth
> > >>> a
> > >>> look at for your project. Also, a few years back in QST
> there was an
> > >>> interesting article on using a kite for a 160 meters
> with 1/2 vertical
> > >>> dipole antenna.
> > >>>
> > >>> I suspect you would need a pile of ground radial to be
> effective
> > >>> with a 1/4 vertical, while the loop might be a more
> wire friendly
> > >>> way to go and possibly safer. Not being a 160 meter
> kind of guy, I
> > >>> suspect others will verify the number of radials required for
> > >>> balloon vertical antenna. 73 Eric - Ve3gsi.
> > >>>
> > >>>
> > >>>> -----Original Message-----
> > >>>> From: Gregg Seidl
> > >>>> Subject: [TowerTalk] ballon supported antenna
> > >>>>
> > >>>> Has anyone ever done this? I want to use a weather ballon to
> > >>>> support a vertical dipole for 160 during the upcoming
> contest. I
> > >>>> have plenty of room with no chance of the antenna hitting or
> > >>>> coming in contact with HV power
> > >>>> lines. What size ballon,where did you get it
> from.......??I'd only have
> > >>>> it
> > >>>> up during the contest. Gregg K9KL
> > >>>
> > >>>
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