Return-Path: Received: (qmail 16535 invoked from network); 3 Jul 2001 11:10:45 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 3 Jul 2001 11:10:45 -0000 Received: (qmail 23243 invoked from network); 3 Jul 2001 11:09:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 3 Jul 2001 11:09:39 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15HNy4-000624-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 03 Jul 2001 12:03:44 +0100 Received: from lepidachrosite.lion-access.net ([212.19.217.3]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15HNy3-00061z-00 for rsgb_lf_group@blacksheep.org; Tue, 03 Jul 2001 12:03:43 +0100 Received: from w8k3f0 (Data.StarTrek.dialin.freeler.nl [212.26.212.12]) by lepidachrosite.lion-access.net (I-Lab) with SMTP id 9D22CCB18B for ; Tue, 3 Jul 2001 11:01:32 +0000 (GMT) Message-ID: <002f01c103b0$79732040$0cd41ad4@w8k3f0> From: "Dick Rollema" To: rsgb_lf_group@blacksheep.org References: <005801c10321$245f1620$506197d4@W98.swipnet.se> Subject: LF: Power of GBR at 16kHz Date: Tue, 3 Jul 2001 12:59:51 +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 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: To All from PA0SE Christer, SM6PXJ, wrote: For comparison, would it be possible for you to make the same measurement and calculation for the GBR transmitter on 16 kHz? I happily comply. GBR on 16kHz is received here with a field strength of 5mV/m. I'm not sure where GBR is located but I assume it to be Rugby. With a ruler and a 1 : 4000000 map of Europe I found the distance to be about 380km. These data were used to enter the graphs in CCIR Recommendation 378-7. The curves for 15kHz are the nearest ones to 16kHz and 17.2kHz (SAQ). Applying this curve indicates that the EIRP at GBR necessary to produce a field strength of 5mV/m at PA0SE must be: 41kW for propagation over perfect earth 63kW for propagation over sea water 63kW for propagation over "land". 73, Dick, PA0SE JO22GD