Return-Path: Received: (qmail 10018 invoked from network); 31 May 2001 17:04:04 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 31 May 2001 17:04:04 -0000 Received: (qmail 21315 invoked from network); 31 May 2001 17:03:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 May 2001 17:03:37 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 155Vkw-0004Km-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 31 May 2001 17:57:06 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 155Vks-0004Kh-00 for rsgb_lf_group@blacksheep.org; Thu, 31 May 2001 17:57:03 +0100 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 155VkJ-00045i-00 for rsgb_lf_group@blacksheep.org; Thu, 31 May 2001 17:56:27 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.130.252] (helo=mj9ar) by gemini.herts.ac.uk with smtp (Exim 3.22 #2) id 155VkI-0005Gp-00 for rsgb_lf_group@blacksheep.org; Thu, 31 May 2001 17:56:26 +0100 From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Thu, 31 May 2001 17:57:19 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: 73/136 khz In-reply-to: <3B165EF0.18495.14AC94B@localhost> References: <3B14B3E8.2E1001E@ns.sympatico.ca> X-Mailer: Pegasus Mail for Win32 (v3.11) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear John, LF group, As well as GBR and HBG, there is also DCF77 (I think) on 77.5kHz - this has similar 1-second ticks to HBG. Note that the signal radiated by GBR around 73.25 changes at irregular intervals, often several times a day, and often seems to be radiating two signals simultaneously. Recently I have seen: -No signal at all -Single carrier some tens of Hz above or below the nominal frequency -two carriers straddling the nominal frequency -various mixtures of RTTY-like data signals and carriers. I think all these signals have ERPs of some 10s of kW, so would have to be quite strong audible signals across the pond before there is much chance of detecting 1W ERP or less amateur signals. Good luck - will be interested to know what you can hear over there. Cheers, Jim Moritz 73 de M0BMU