Return-Path: 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 ; 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: Content-transfer-encoding: 8bit Hi all,

During some RX experiments in the VLF spectrum a few minutes ago, using a
bundle of ferrite rods and lot of wire as antenna. There was..
- a quite strong signal on 16kHz, 100 Hz wide;
- an other signal (stronger) on 18.3kHz, more than 200 Hz wide;
- the Russian Navy(?) on 18.1kHz, about 100 Hz wide with a typical FSK
pattern (transmitter switched off after the transmission).

An old list says on 16.0kHz is "Rugby RTTY 75", another says its "RTTY 200".
But the signal on 16kHz looks more like a well-shaped PSK signal to me. Or is
it just a very stable QRM in my neighbourhood..

Any information available on this reflector ? If the signal on 16.0kHz is
really PSK, where will the planned CW transmission be on Tuesday afternoon ?

Thanks in advance for any info,
 73's from Wolf DL4YHF.