Return-Path: <majordom@post.thorcom.com> Received: (qmail 27753 invoked from network); 27 May 2001 21:06:27 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 27 May 2001 21:06:27 -0000 Received: (qmail 14148 invoked from network); 27 May 2001 21:05:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 May 2001 21:05:39 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 1547do-0001x0-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 27 May 2001 22:00:00 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from imo-d05.mx.aol.com ([205.188.157.37]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 1547dm-0001t8-00 for rsgb_lf_group@blacksheep.org; Sun, 27 May 2001 21:59:58 +0100 Received: from DL4YHF@aol.com by imo-d05.mx.aol.com (mail_out_v30.22.) id l.9b.15a94191 (17383) for <rsgb_lf_group@blacksheep.org>; Sun, 27 May 2001 16:58:49 -0400 (EDT) From: DL4YHF@aol.com Message-ID: <9b.15a94191.2842c489@aol.com> Date: Sun, 27 May 2001 16:58:49 EDT Subject: LF: Modulation pattern on 16kHz ? To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Mailer: AOL 6.0 for Windows DE sub 217 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: <majordom@post.thorcom.com> Content-transfer-encoding: 8bit <HTML><FONT FACE=arial,helvetica><FONT SIZE=2>Hi all, <BR> <BR>During some RX experiments in the VLF spectrum a few minutes ago, using a <BR>bundle of ferrite rods and lot of wire as antenna. There was.. <BR>- a quite strong signal on 16kHz, 100 Hz wide; <BR>- an other signal (stronger) on 18.3kHz, more than 200 Hz wide; <BR>- the Russian Navy(?) on 18.1kHz, about 100 Hz wide with a typical FSK <BR>pattern (transmitter switched off after the transmission). <BR> <BR>An old list says on 16.0kHz is "Rugby RTTY 75", another says its "RTTY 200". <BR>But the signal on 16kHz looks more like a well-shaped PSK signal to me. Or is <BR>it just a very stable QRM in my neighbourhood.. <BR> <BR>Any information available on this reflector ? If the signal on 16.0kHz is <BR>really PSK, where will the planned CW transmission be on Tuesday afternoon ? <BR> <BR>Thanks in advance for any info, <BR> 73's from Wolf DL4YHF. <BR></FONT></HTML>