Return-Path: Received: from mtain-di06.r1000.mx.aol.com (mtain-di06.r1000.mx.aol.com [172.29.64.10]) by air-de04.mail.aol.com (v129.4) with ESMTP id MAILINDE042-5eaf4cab8dee41; Tue, 05 Oct 2010 16:43:26 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-di06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 8430C38000091; Tue, 5 Oct 2010 16:43:24 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1P3EKj-0007uB-2M for rs_out_1@blacksheep.org; Tue, 05 Oct 2010 21:41:57 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1P3EKi-0007u2-Mb for rsgb_lf_group@blacksheep.org; Tue, 05 Oct 2010 21:41:56 +0100 Received: from lon1-post-3.mail.demon.net ([195.173.77.150]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1P3EKg-0001YH-I8 for rsgb_lf_group@blacksheep.org; Tue, 05 Oct 2010 21:41:56 +0100 Received: from sighthound.demon.co.uk ([80.177.174.126]) by lon1-post-3.mail.demon.net with esmtp (Exim 4.69) id 1P3EKB-000346-f3 for rsgb_lf_group@blacksheep.org; Tue, 05 Oct 2010 20:41:53 +0000 Received: from opc1 (opc1.twatt.home [192.168.21.16]) by svr3.twatt.home (Postfix) with ESMTP id 3CF331BE15 for ; Tue, 5 Oct 2010 21:41:23 +0100 (BST) Date: Tue, 5 Oct 2010 21:41:22 +0100 From: John P-G To: rsgb_lf_group@blacksheep.org Message-ID: <20101005214122.35319e66@opc1> In-Reply-To: <20101005211707.34f8e8be@opc1> References: <507BA536922744A492A0688F07B4851F@Inspiron> <6CE5F9E1C58945C49E23494A9B755CE3@AGB> <20101005211707.34f8e8be@opc1> Organization: The Gammy Bird X-Mailer: Claws Mail 3.7.4 (GTK+ 2.20.1; i486-pc-linux-gnu) Mime-Version: 1.0 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: QRM 498-502 kHz Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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-aol-global-disposition: G x-aol-sid: 3039ac1d400a4cab8dec3891 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none On Tue, 5 Oct 2010 21:17:07 +0100 John P-G wrote: > It seems strange that I can't hear it but that might help rule in/out > a possible location? > > I'll keep looking. > I spoke too soon! I think I can see it on a waterfall now, but using a passive wire antenna. Whether the ALA1530 loop has a low enough noise floor to use it to DF is a moot point. I'll keep an eye on things see if I can get something to get a bearing on. In the meantime I've set up SpecLab to save a grab every 5 minutes to my public Dropbox folder, here: http://dl.dropbox.com/u/3551430/gm4slv.jpg The grabber covers 497.6 - 499.2 which shows the LF edge of the noise at 498kHz. I might have to think about a Perseus now, to look at wider areas. An SSB bandwidth suddenly looks so limited! Cheers, John