Return-Path: Received: (qmail 6465 invoked from network); 18 Dec 1999 06:59:32 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by 212.159.2.33 with SMTP; 18 Dec 1999 06:59:32 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 11zEGE-0000a9-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 18 Dec 1999 07:26:38 +0000 Received: from mta00.talk21.com ([62.172.192.40] helo=t21mta00-app.talk21.com) by post.thorcom.com with esmtp (Exim 3.02 #1) id 11zEGC-0000a4-00 for rsgb_lf_group@blacksheep.org; Sat, 18 Dec 1999 07:26:37 +0000 Received: from dave ([213.1.12.139]) by t21mta00-app.talk21.com (InterMail vM.4.01.02.00 201-229-116) with SMTP id <19991218065312.ENBF7774.t21mta00-app.talk21.com@dave> for ; Sat, 18 Dec 1999 06:53:12 +0000 Message-ID: <000b01bf4924$b7163740$8b0c01d5@dave> From: "Dave Sergeant" To: "rsgb_lf_group" Subject: LF: 136 Propogation Date: Sat, 18 Dec 1999 06:42:54 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=Windows-1252; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: >From Dave G3YMC The mails from Laurie and Rik on this subject are interesting. They show a reflection layer for sky wave at some 60-80km, with a first hop skip distance a little under 2000km. Perahps that explains why the current distance record is not very much more than that. It also explains why the better equipped G stations can relatively easily work Reino, whereas those of us with more modest set-ups with relatively low antennas (and high angle radiation) have difficulty even hearing him. Presumably 2 hops are required to work the USA. Cheers Dave G3YMC dsergeant@iee.org http://ourworld.compuserve.com/homepages/sergeantd