Envelope-to: dave@picks.force9.co.uk Delivery-date: Tue, 05 Jul 2005 09:13:08 +0100 Received: by ptb-mxcore14.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1DpiYG-0000M1-1n for dave@picks.force9.co.uk; Tue, 05 Jul 2005 09:13:08 +0100 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore14.plus.net with esmtp (PlusNet MXCore v2.00) id 1DpiYF-0000Lo-TD for dave@picks.force9.co.uk; Tue, 05 Jul 2005 09:13:08 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1DpiY7-0002Kc-Rv for rs_out_1@blacksheep.org; Tue, 05 Jul 2005 09:12:59 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1DpiY7-0002KT-Af for rsgb_lf_group@blacksheep.org; Tue, 05 Jul 2005 09:12:59 +0100 Received: from smtp807.mail.ukl.yahoo.com ([217.12.12.197]) by relay1.thorcom.net with smtp (Exim 4.51) id 1Dpias-0003Dd-44 for rsgb_lf_group@blacksheep.org; Tue, 05 Jul 2005 09:15:51 +0100 Received: (qmail 70376 invoked from network); 5 Jul 2005 08:12:52 -0000 Received: from unknown (HELO ?81.131.80.209?) (james.moritz@btopenworld.com@81.131.80.209 with login) by smtp807.mail.ukl.yahoo.com with SMTP; 5 Jul 2005 08:12:50 -0000 Received: from 127.0.0.1 (AVG SMTP 7.0.323 [267.8.9]); Tue, 05 Jul 2005 09:11:49 +0100 Message-ID: <001101c58139$3188e020$d1508351@w4o8m9> From: "James Moritz" To: rsgb_lf_group@blacksheep.org References: Date: Tue, 5 Jul 2005 09:11:49 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 Subject: LF: Re: 136kHz and Rugby Loran Content-Type: text/html; charset=windows-1252 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-PN-SpamFiltered: by PlusNet MXCore (v2.00) Content-transfer-encoding: 8bit

Dear David, LF Group,

I made a .wav file recording of the Loran start-up this morning at about 0651utc - I'll try and edit this down to a reasonable size. For the last couple of weeks, the Rugby Loran has not operated at the weekends, only during the day on weekdays starting around 0700 utc until about 1530 utc. I wasn't around yesterday, but it seems to be following that pattern today.

Cheers, Jim Moritz

73 de M0BMU

----- Original Message -----

From: G0MRF@aol.com

To: rsgb_lf_group@blacksheep.org

Sent: Tuesday, July 05, 2005 8:44 AM

Subject: Re: LF: Re: Re: 136kHz and Rugby Loran

Hello Jim.

Thanks for the 'permission' I'll try and information gather for a couple of days and then send them something fairly complete by the end of the week.

Yes, a recording from Dave would be very convincing. I must calculate the exact distance from here and try to get a 'specrogram' of the QRM. Thanks in particular for the very useful 'added noise within a specific bandwidth' figures.

Do you know if it's been operational recently on a daily basis or is it still a few days on then a couple of days off while they make adjustments?

Regards

David

In a message dated 04/07/2005 21:58:47 GMT Standard Time, james.moritz@btopenworld.com writes:

Dear David, LF Group,

Please feel free to use the "published" info. So far, the only day I captured the exact times of operation was 30th June, when Rugby started at 0650 utc and shut down at 1526 utc, if the clock in my computer is to be believed. At the moment, Rugby still seems to be operating the Loran TX "office hours only" - it usually seems to come on about 8am BST, give or take 20 mins or so - perhaps it would be a good idea to make some audio recordings as .wav files or similar of the actual start-up. I guess this would be pretty convincing, especially if G3YXM can make a recording! There was so much QRN during the afternoons in the last couple of weeks it was hard to see on my spectrograms where the transmissions actually shut down, but that may have improved this week. But since the natural band noise is quite low in these summer mornings, the effect of the Loran noise is more impressive then. I will set my alarm clock for tomorrow morning.