Return-Path: Received: (qmail 28000 invoked from network); 20 Jul 1999 19:42:45 +0100 Received: from magnus.plus.net.uk (HELO magnus.force9.net) (195.166.128.27) by guiness.force9.net with SMTP; 20 Jul 1999 19:42:45 +0100 Received: (qmail 20632 invoked from network); 20 Jul 1999 18:44:53 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by magnus.plus.net.uk with SMTP; 20 Jul 1999 18:44:53 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 116eVQ-0001O1-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 20 Jul 1999 19:20:44 +0100 Received: from smtp.mail.big-orange.net ([143.179.236.32] helo=Lesothosaurus.big-orange.net) by post.thorcom.com with esmtp (Exim 3.02 #1) id 116eVP-0001Nq-00 for rsgb_lf_group@blacksheep.org; Tue, 20 Jul 1999 19:20:43 +0100 Received: from w8k3f0 ([143.179.150.113]) by Lesothosaurus.big-orange.net (Netscape Messaging Server 3.6) with SMTP id AAA5A3B; Tue, 20 Jul 1999 20:20:32 +0200 Message-ID: <001701bed2dd$35c59860$7196b38f@w8k3f0> From: "Dick Rollema" To: "LF-Group" Cc: "Pieter Bruinsma" , "Mike Perry, PA7XG" , "Koos Fockens, PA0KDF" , "Klaas Spaargaren, PA0KSB" , "Jan Hekkert, PA3HCD" , "Ger van Went, PA0GER" Subject: LF: Fw: Antenna Software Date: Tue, 20 Jul 1999 20:22:56 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org Sender: -----Oorspronkelijk bericht----- Van: Roy Lewallen Aan: Dick Rollema Datum: dinsdag 20 juli 1999 19:35 Onderwerp: Re: Antenna Software >Dick, > >Only the professional versions of EZNEC (EZNEC-M and EZNEC/4) directly >report the ground wave. However, a reasonable approximation of the >ground wave field strength can be gotten by using the EZNEC near field >analysis. This is because the "near field" analysis actually calculates >the total field, both near and far, including the ground wave. The near >field analysis results are available only as numbers; they are not >plotted as a graphical pattern. > >Roy Lewallen, W7EL > >> Dick Rollema wrote: >> >> Dear Roy, >> >> Quite a few countries in Europe now have made the 136 kHz longwave >> band available to amateurs. >> >> Although at night some sky wave propagation may be present most of the >> contacts are made via the so called surface wave. >> >> I wonder whether EZNEC and ELNEC produce proper radiation patterns for >> that kind of wave propagation? >> >> 73, Dick, PA0SE >> >> D.W. Rollema >> V.d. Marckstraat 5 >> 2352 RA Leiderdorp >> The Netherlands >> Tel. +31 71 589 27 34 >> E-mail: d.w.rollema@gironet.nl >