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
> >>>
> >>>
> >>> _______________________________________________
> >>>
> >>>
> >>>
> >>> _______________________________________________
> >>> TowerTalk mailing list
> >>> TowerTalk@contesting.com
> >>> http://lists.contesting.com/mailman/listinfo/towertalk
> >>
> >> _______________________________________________
> >>
> >>
> >>
> >> _______________________________________________
> >> TowerTalk mailing list
> >> TowerTalk@contesting.com
> >> http://lists.contesting.com/mailman/listinfo/towertalk
> >>
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|