To add to his point, when I moved into this house in 1977 I put up a 5-band
trap vertical (10-80) and put untuned ground radials out in 4 directions
for about 20 feet. I used a 3 foot ground rod at the end of each radial
and an 8 foot rod in the center. When I was tuning it up, I heard a
british sounding voice and gave him a call after his QSO ended. He was in
Australia. Not bad for barefoot with an FT-101 in Maryland.
As a side point, I have been rather disappointed with my R7 mounted about
12 feet high.
73 Stan, N3HS
>From: AD6E@aol.com
To: <writelog@contesting.com>
>Date: Tue, 12 Jun 2001 12:24:53 EDT
>Subject: Re: [WriteLog] SO2R contesting question
>To: jbrannig@optonline.net, writelog@contesting.com
>X-Mailer: AOL 5.0 for Windows sub 124
>Sender: owner-writelog@contesting.com
>X-Sponsor: W4AN, KM3T, N5KO & AD1C
>
>
>Jim (et all);
>
>Not to belabor a point, but I thought a quickie expansion of vertical problem
>might help: Ground losses are not just 1/4 wavelength from the antenna. Good
>radials take care of that. As the signal radiates from the vertical the
>electric field, being vertical, induces eddie currents in the earth for many
>many wavelengths until the signal becomes a "sky wave". All those eddies sap
>signal strength both comming and going. Thats why salt water works so well.
>However, it needs several miles of salt water in the desired direction to be
>really effective for DX.
>
>73, Al
>
>
>In a message dated 6/11/2001 16:12:36 Pacific Daylight Time,
>jbrannig@optonline.net writes:
>
> > I have been fooling around with ground mounted verticals for years (and
> > dipoles and Yagis)
> > The view that they "radiate in all directions poorly" is generally
> true....
> > Ground conductivity is crucial. In this area we have hardpan , rocks and
> > clay over sand....all manner of radials did not do the job.
> > but, with that said, I have had some luck with a 1/4 wavelength on
> > 40M....higher freqs. require getting it up in the air, but a dipole will
> > work better.
> > my 2cents
> > Jim
> >
>
>--
>WWW: http://www.writelog.com/
>Submissions: writelog@contesting.com
>Administrative requests: writelog-REQUEST@contesting.com
>Problems: owner-writelog@contesting.com
--
WWW: http://www.writelog.com/
Submissions: writelog@contesting.com
Administrative requests: writelog-REQUEST@contesting.com
Problems: owner-writelog@contesting.com
|