Message-ID: <002c01cb6aee$1da0a8a0$0401a8c0@xphd97xgq27nyf>
From: "mal hamilton" <g3kevmal@talktalk.net>
To: <rsgb_lf_group@blacksheep.org>
References: <000c01cb6abb$719bb6d0$0401a8c0@xphd97xgq27nyf> <9BC685267F7D463C959F12E846B1E6F2@JimPC>
Date: Wed, 13 Oct 2010 16:48:43 +0100
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Subject: LF: Re: Re: Ground proximity antennas
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Jim
I am sure a beverage would perform over good ground but to what degree would
it be less efficient than over poor ground.
Any bit of metal, wire etc will radiate something like the proberbial bed
springs or hook up to your central heating radiator system. Try this and you
will be heard probably several miles away but that is hardly the way to
proceed, likewise apart from having fun  Ground Promimity Antennas are no
substitute for a real elevated antenna up as high as possible especially on
LF/MF
regarding DX
Working DX is not an isolated fete, there are others doing likewise on the
band so one is aware what is going on and I have never failed to hear the DX
that others are hearing/working some with beverages but most without.
A proper half wave or 1/4 wave vertical antenna or full size one wave loop
erected at a optimum height or as near as possible on the band of interest
is hard to beat
or better still at the higher frequencies a multi ele yagi or quad array.
  73 Mal/G3KEV

----- Original Message -----
From: "James Moritz" <james.moritz@btopenworld.com>
To: <rsgb_lf_group@blacksheep.org>
Sent: Wednesday, October 13, 2010 1:57 PM
Subject: LF: Re: Ground proximity antennas


> Dear Mal, LF Group,
>
> G3KEV wrote:
> ...>Antennas described on here recently on or near the ground are only
> variations of Beverage antennas and inefficient for Transmitting...
>
> This is missing the point. I think the interesting questions about such
> antennas are:
>
> -Achieving great enough antenna height  to make an LF antenna that is
> actually "efficient" is usually impossible for amateurs. Sometimes it is
> possible to erect a very long, but low height antenna, so does this form
of
> antenna have advantages in efficiency or otherwise over a short, low
height
> antenna? What is the best way of using such antennas?
>
> -The text-book explanation of Beverage antenna operation, including that
low
> ground conductivity is neccessary for proper operation, etc. is not very
> convincing to me - I don't really believe that such an antenna over a
> perfect ground plane would fail to radiate or receive any signals. So in
> what mode to such antennas actually operate?
>
> G3KEV also wrote:
> ...>I have never missed any DX signals by not having one.
>
> Ahh, but how would you know? You can't prove the negative... Maybe that
> prime DX station was calling, calling, calling, but to no avail due to
your
> deaf antenna ;-)
>
> Cheers, Jim Moritz
> 73 de M0BMU
>
>