Message-ID: <3B66FAAB.A6F02F4B@alg.demon.co.uk>
Date: Tue, 31 Jul 2001 19:36:27 +0100
From: "Steve Rawlings" <steve@alg.demon.co.uk>
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To: rsgb_lf_group@blacksheep.org
Subject: LF: Loop antennas
References: <9qoxmJAn3kZ7Ew4x@telemetry.demon.co.uk>
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Tom G3OLB wrote:

> Perhaps I should get on and try a loop receive antenna then maybe I
> would copy you. I had intended doing so soon to try and null out Lessay
> Loran which is strong here in the South-West. I am sure I will hear you
> when you use the Butternut for transmit - looking forward to working you
> again.

I have been amazed at how well you (Tom) copy stations on 136,
especially since you are so much closer to the Loran transmitter
than me.  Nevertheless, I do believe that you will find an
overall improvement in the reception of weak signals once you've
got a loop installed to null out Loran. 

As a test, you could start by connecting the far ends of your HF
inverted 'V' dipole together with a long length of wire, and
tuning the resulting loop from the shack end of the feeder.  If
this seems practicable at your QTH (perhaps having to rotate the
antenna to null out Loran), have a look at:
http://www.alg.demon.co.uk/radio/136/loop.htm
or:
http://www.btinternet.com/~dsergeant/loops.htm

Regards to all,
Steve GW4ALG