Return-Path: Received: (qmail 25398 invoked from network); 9 Feb 2000 14:22:17 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by grants.core.plus.net.uk with SMTP; 9 Feb 2000 14:22:17 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12IXrJ-0006eu-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 09 Feb 2000 14:12:45 +0000 Received: from lepidachrosite.lion-access.net ([212.19.217.3]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12IXrF-0006ep-00 for rsgb_lf_group@blacksheep.org; Wed, 09 Feb 2000 14:12:42 +0000 Received: from w8k3f0 (2410825294.dialin.freeler.nl [143.178.70.78]) by lepidachrosite.lion-access.net (I-Lab) with SMTP id 79985CAEEC for ; Wed, 9 Feb 2000 14:12:12 +0000 (GMT) Message-ID: <004001bf7308$638bc460$4e46b28f@w8k3f0> From: "Dick Rollema" To: "LF-Group" Subject: LF: Surface Wave Date: Wed, 9 Feb 2000 15:11:57 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 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: Content-transfer-encoding: 8bit
To All from PA0SE
 
Further to my email of 11.14:
 
I'm afraid I did not make very clear that the vertical radiation pattern of antennas, as found in the books, do not include the surface wave. The null in the pattern under low angles over real ground is filled by the surface wave.
It is the surface wave we use for our LF QSO's up to a few hundred kilometres.
 
 
I can recommend studying an old, but very readable article:
 
Radio Propagation Fundamentals
 
          by
 
Kenneth Bullington
 
The Bell System Technical Journal, Volume XXXVI, May 1957,
Number 3
 
73, Dick, PA0SE