Return-Path: Received: (qmail 20012 invoked from network); 10 Jun 2002 14:22:27 -0000 Content-Transfer-Encoding: 8bit Received: from marstons.services.quay.plus.net (212.159.14.223) by mailstore with SMTP; 10 Jun 2002 14:22:27 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 3937 invoked by uid 10001); 10 Jun 2002 14:26:16 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.70) by marstons.services.quay.plus.net with SMTP; 10 Jun 2002 14:26:16 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 17HPx6-0005Bw-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 10 Jun 2002 15:15:24 +0100 Received: from mail4.messagelabs.com ([212.125.75.12]) by post.thorcom.com with smtp (Exim 3.33 #2) id 17HPx4-0005Br-00 for rsgb_lf_group@blacksheep.org; Mon, 10 Jun 2002 15:15:22 +0100 X-VirusChecked: Checked Received: (qmail 10273 invoked from network); 10 Jun 2002 14:15:10 -0000 Received: from merimac.us.gases.boc.com (HELO merimac) (204.149.80.4) by server-21.tower-4.messagelabs.com with SMTP; 10 Jun 2002 14:15:10 -0000 Received: by EXC_WIL04 with Internet Mail Service (5.5.2653.19) id ; Mon, 10 Jun 2002 10:23:28 -0400 Message-ID: From: "Ashlock,William" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Re: RE: Vertical angles Date: Mon, 10 Jun 2002 10:04:12 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Mike, > >When several UK stations used loop antennas, I noticed that they had fading > >at much shorter distances than those using Marconis. This was at about > >300km, whereas Marconi users experience fading at about 500km. > Possibly due to lower output? No, I really mean fading, not weaker signal. The fading was typically slow - perhaps over 30-60 seconds. Very interesting! >>Therefore the location of the feedpoint does not effect the wave angle. >So, presumably my first theory is correct - loops have a higher angle of radiation than Maconis. For sure! What I would really like to do is entice someone to transmit on both a loop and a vertical at the same time with a frequency separation that is small enough to be seen on an ARGO screen - then determine how the signals compare on a minute by minute basis from different captures via the ionosphere. I probably could do this myself using my old vertical hardware and old antenna location but the efficiency of the vertical compared to the loop would be down at least 6 dB due to the big deQing problem at the only location I have for the top hat sort-of free of trees. A lot of captures that guys normally make of my signal at 400 - 500mi during the winter season can probably live with the 6db handicap, though. 73, Bill A >Mike, G3XDV _____________________________________________________________________ This message has been checked for all known viruses by UUNET delivered through the MessageLabs Virus Control Centre. For further information visit http://www.uk.uu.net/products/security/virus/ _____________________________________________________________________ This message has been checked for all known viruses by UUNET delivered through the MessageLabs Virus Control Centre. For further information visit http://www.uk.uu.net/products/security/virus/