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Message-ID: <HPHj5CAH8aK5EwsN@pickmere.demon.co.uk>
Date: Mon, 22 May 2000 23:04:55 +0100
To: rsgb_lf_group@blacksheep.org
From: "M.J.Powell" <mike@pickmere.demon.co.uk>
Subject: Re: LF: Re: Re: Morse tones / filters etc.
References: <003a01bfc415$89018a00$7929f7c2@oemcomputer> <Pine.GSO.3.95.1000522110818.17635D-100000@oso.slonet.org>
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In message <Pine.GSO.3.95.1000522110818.17635D-100000@oso.slonet.org>,
Clifford Buttschardt <cbuttsch@slonet.org> writes
>Interesting observation on real time listening on LF.  When I was at sea
>as a radio officer I arranged two receivers one vertical and the other
>horizontal using the longwire 500 kHz antenna tuned to the same frequency
>within one hertz.  Then by using two headphones, each arranged so that
>opposite ears listened to opposite polarizations, results were simply
>amazing!  With some very weak LF signals and especially with some ten
>meter satellite signals, I would estimate the readability increased by at
>least fifty percent.  The ease in which signals buried in QRN could be
>read was something I've wanted to investigate ever since that experiment.

I did something vaguely similar with 6m SSB, but I switched by hand a
vertical and a horizontal antenna into the receiver. Fades were
virtually eliminated. Showing I think that there was a lot of
polarisation rotation on the incoming signals, but at LF?

Mike
-- 
M.J.Powell