Return-Path: Received: (qmail 19605 invoked from network); 24 Apr 2003 11:26:24 -0000 Content-Transfer-Encoding: 8bit Received: from netmail02.services.quay.plus.net (212.159.14.221) by mailstore with SMTP; 24 Apr 2003 11:26:24 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 15561 invoked by uid 10001); 24 Apr 2003 11:26:24 -0000 Received: from post.thorcom.com (193.82.116.70) by netmail02.services.quay.plus.net with SMTP; 24 Apr 2003 11:26:22 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.14) id 198er0-0003pA-Sy for rsgb_lf_group-outgoing@blacksheep.org; Thu, 24 Apr 2003 12:25:26 +0100 Received: from [147.197.200.9] (helo=hestia.herts.ac.uk) by post.thorcom.com with esmtp (Exim 4.14) id 198equ-0003p1-HT for rsgb_lf_group@blacksheep.org; Thu, 24 Apr 2003 12:25:20 +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 198eqk-0001lH-00 for rsgb_lf_group@blacksheep.org; Thu, 24 Apr 2003 12:25:10 +0100 Received: from [147.197.232.252] (helo=rsch-15.herts.ac.uk) by gemini.herts.ac.uk with esmtp (Exim 3.33 #1) id 198eqY-0007R5-00 for rsgb_lf_group@blacksheep.org; Thu, 24 Apr 2003 12:24:59 +0100 Message-ID: <5.1.0.14.0.20030424114505.00a9ffd8@gemini.herts.ac.uk> X-Sender: mj9ar@gemini.herts.ac.uk X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Thu, 24 Apr 2003 12:24:50 +0100 To: rsgb_lf_group@blacksheep.org From: "James Moritz" MIME-Version: 1.0 X-MailScanner: No Virus detected Subject: LF: RN6BN/propagation Content-Type: text/plain; charset=us-ascii; format=flowed X-Spam-Status: No, hits=0.0 required=5.0tests=noneversion=2.53 X-Spam-Checker-Version: SpamAssassin 2.53 (1.174.2.15-2003-03-30-exp) X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Dear LF Group, I had a nice QRSS contact with RN6BN last night, with "O" reports both ways, and 'BN was a clearly audible S3 signal at my location. Several others stations were also active, including IK2PII who I don't think I have seen before. It is interesting how there seems to be a division between paths up to about 3000km, where good conditions are fairly commonplace during darkness hours, and those over about 5000km, where good conditions are much rarer and change very rapidly. Both must surely involve mostly sky-wave propagation, but the longer distance paths just evaporate whenever there is a whiff of solar activity. The shorter paths on the other hand seem much less affected. So my guess is there is a change in propagation modes somewhere in the region of 4000km - I suppose CT1DRPs beacon signals to the eastern US are on the borderline, so make for an interesting comparison. Cheers, Jim Moritz 73 de M0BMU