Delivered-To: daveyxm@virginmedia.com Received: by 10.50.96.198 with SMTP id du6csp148844igb; Sun, 13 Oct 2013 07:05:39 -0700 (PDT) X-Received: by 10.180.76.48 with SMTP id h16mr10857350wiw.32.1381673139211; Sun, 13 Oct 2013 07:05:39 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25]) by mx.google.com with ESMTP id o9si3835154wic.15.2013.10.13.07.05.38 for ; Sun, 13 Oct 2013 07:05:39 -0700 (PDT) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1VVLp1-0004JS-NC for rs_out_1@blacksheep.org; Sun, 13 Oct 2013 14:35:03 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1VVLp1-0004JJ-BY for rsgb_lf_group@blacksheep.org; Sun, 13 Oct 2013 14:35:03 +0100 Received: from know-smtprelay-omc-3.server.virginmedia.net ([80.0.253.67]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1VVLoz-0002fx-SC for rsgb_lf_group@blacksheep.org; Sun, 13 Oct 2013 14:35:02 +0100 Received: from [192.168.2.3] ([86.11.222.118]) by know-smtprelay-3-imp with bizsmtp id cdb11m00C2Zsi3201db1me; Sun, 13 Oct 2013 14:35:01 +0100 X-Originating-IP: [86.11.222.118] X-Spam: 0 X-Authority: v=2.0 cv=LIo+2+q9 c=1 sm=1 a=SuBfSidSudpnzoPf7Jvm+w==:17 a=uObrxnre4hsA:10 a=9YlaCzn6_68A:10 a=kj9zAlcOel0A:10 a=NLZqzBF-AAAA:8 a=XjQzdAD-is0A:10 a=-F_C79mT7x6YLpHg_QMA:9 a=CjuIK1q_8ugA:10 a=SuBfSidSudpnzoPf7Jvm+w==:117 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Sun, 13 Oct 2013 14:35:00 +0100 MIME-Version: 1.0 Message-ID: <525AAF94.3672.10A9869@mike.dennison.ntlworld.com> X-mailer: Pegasus Mail for Windows (4.41) Content-description: Mail message body X-Spam-Score: -0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: I wonder why the current working frequency of 74,5495kHz was chosen? According to my receive system this is still on the edge of the noise sidebands from DCF77, and some 3dB S/N could be gained by operating from 1kHz to 3kHz further LF. Is this just my receiver/antenna (perhaps my antenna has gone HF as the leaves fall off the trees), or do others see this? [...] Content analysis details: (-0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [80.0.253.67 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record X-Scan-Signature: cc2e5baae40f8f7a09b47e6877ef0bfb Subject: LF: 74kHz frequency 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 Status: O X-Status: X-Keywords: X-UID: 263 I wonder why the current working frequency of 74,5495kHz was chosen? According to my receive system this is still on the edge of the noise sidebands from DCF77, and some 3dB S/N could be gained by operating from 1kHz to 3kHz further LF. Is this just my receiver/antenna (perhaps my antenna has gone HF as the leaves fall off the trees), or do others see this? 3dB doesn't sound much but is a lot with a marginal QRSS signal. Any comments from other Eu receive stations? Mike ====