Return-Path: Received: (qmail 8743 invoked from network); 2 Nov 2004 12:37:13 -0000 Received: from unknown (HELO ptb-spamcore02.plus.net) (192.168.71.3) by ptb-mailstore02.plus.net with SMTP; 2 Nov 2004 12:37:13 -0000 Received: from mailnull by ptb-spamcore02.plus.net with spamcore-l-b (Exim 4.32; FreeBSD) id 1COxug-0001wJ-Il for dave@picks.force9.co.uk; Tue, 02 Nov 2004 12:37:27 +0000 Received: from [192.168.67.2] (helo=ptb-mxcore02.plus.net) by ptb-spamcore02.plus.net with esmtp (Exim 4.32; FreeBSD) id 1COxuf-0001wF-Qg for dave@picks.force9.co.uk; Tue, 02 Nov 2004 12:37:26 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1COxuP-0004Tq-BN for dave@picks.force9.co.uk; Tue, 02 Nov 2004 12:37:09 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1COxtx-0004DV-9h for rs_out_1@blacksheep.org; Tue, 02 Nov 2004 12:36:41 +0000 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1COxtw-0004DM-TR for rsgb_lf_group@blacksheep.org; Tue, 02 Nov 2004 12:36:40 +0000 Received: from imo-m20.mx.aol.com ([64.12.137.1]) by relay.thorcom.net with esmtp (Exim 4.41) id 1COxtt-0003DU-5U for rsgb_lf_group@blacksheep.org; Tue, 02 Nov 2004 12:36:40 +0000 Received: from G0MRF@aol.com by imo-m20.mx.aol.com (mail_out_v37_r3.8.) id l.be.1ad035f5 (3996) for ; Tue, 2 Nov 2004 07:36:24 -0500 (EST) From: G0MRF@aol.com Message-ID: Date: Tue, 2 Nov 2004 07:36:24 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 9.0 for Windows sub 5003 X-SPF-Result: relay.thorcom.net: domain of aol.com designates 64.12.137.1 as permitted sender X-Spam-Score: 0.8 (/) X-Spam-Report: autolearn=no,HTML_20_30=0.474,HTML_MESSAGE=0.001,NO_REAL_NAME=0.285 Subject: Re: LF: RE: Rugby Loran station Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_20_30,HTML_MESSAGE, NO_REAL_NAME autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Filtered: by PlusNet SpamCORE (v3.00) Content-transfer-encoding: 8bit

In a message dated 02/11/2004 12:24:00 GMT Standard Time, j.r.moritz@herts.ac.uk writes:

I don't think a Loran station in the central UK would be a total disaster
for LF; you could still use narrow-band modes like QRSS provided the
frequency was selected carefully, and in many locations you could get a
directional null on the Loran without eliminating all the signals you were
trying to receive, but it certainly would make life more difficult,
especially for CW operation... and especially if you are located where G3YXM
is!

I believe Derek / Stewart etc managed to phase out the Loran signals from Lessay very successfully on the 136k - 2m transponder that they have licenced.

However, filtering at the receiver is a second choice.

With luck, and much 'lobbying' during any testing phase of the Rugby Loran may result in a 136kHz notch filter being placed in line with the feeder. We would need to generate lots of individual letters and find the most appropriate person or persons to send them to.

The RSGB EMC committee would probably also get involved in this. Perhaps a call now while the Loran is being designed would be a good preventative step?

73

David G0MRF