Content-Transfer-Encoding: 8bit
Message-ID: <3.0.1.16.20000111104327.2ed7c288@mail.cc.kuleuven.ac.be>
Date: Tue, 11 Jan 2000 10:43:27
To: rsgb_lf_group@blacksheep.org
From: "Rik Strobbe" <rik.strobbe@fys.kuleuven.ac.be>
Subject: Re: LF: Bad experience with loop ant
In-reply-to: <03ee01bf5b86$87598740$2301a8c0@maly.gmc.net>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii; format=flowed
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
Sender: <majordom@post.thorcom.com>

I tried to make a loop with flatcable once and was not very happy with the
result either. Maybe the rather large stray-capacitance between the
windings is decreasing the loop performance ? Replacing the flatcable by
0.7mm emailled Cu-wire (all windings spaced +/- 5mm) was working much better.
But at the end I came to the conclusion that the loop was no better than my
vertical (but also no worse), because I have little or no problems with
'electric smog' at my QTH.
But for those with rather high noiselevels and/or limited space a loop may
be the best receiving antenna.

73, Rik ON7YD

At 17:19 10/01/00 +0100, OK1FIG wrote:
>Hello LowFers.
>
>I have made loop ant for rx and it seems not to work satisfactorily. Size is
>1.75m x 1.75m. Everything is done as usual, with grounded middle and
>amplifier with 2 x BF245, tuned properly, etc. Output level from the
>amplifier is high enough. I can hear Greek RTTY, also galloping horses a
>little, but no poor HAM sigs. My LW 40m, that is in average height of about
>6 m only, is much better. The only thing I am in doubt is the number of
>turns. It has got only 18 turns (I used flat cable that was available at the
>moment). Could this be reason for the bad results? What are your
>experiencies with loop ant? Can loop ant be as good as "big" Marconi?
>
>73! Petr, OK1FIG
>
>
>
>
>
>
>