Return-Path: Received: (qmail 24912 invoked from network); 8 Jul 2001 12:28:01 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 8 Jul 2001 12:28:01 -0000 Received: (qmail 9164 invoked from network); 8 Jul 2001 12:26:56 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 8 Jul 2001 12:26:56 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15JDZL-0000Kl-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 08 Jul 2001 13:21:47 +0100 Received: from mail1.svr.pol.co.uk ([195.92.193.18]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15JDZJ-0000Kg-00 for rsgb_lf_group@blacksheep.org; Sun, 08 Jul 2001 13:21:45 +0100 Received: from modem-76.edain.dialup.pol.co.uk ([62.136.169.76] helo=g3aqc) by mail1.svr.pol.co.uk with smtp (Exim 3.13 #0) id 15JDYb-0001u9-00 for rsgb_lf_group@blacksheep.org; Sun, 08 Jul 2001 13:21:01 +0100 Message-ID: <000c01c107a8$923c2580$4ca9883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re. Rx sensitivity again Date: Sun, 8 Jul 2001 13:21:11 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 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

Hi Alan and All.

Alans comments re Reg's Groundwave program and DCF39 prompted me to get my F/S equipment out this morning. I use a calibrated ferrite rod antenna and an SPM-3 Level meter.

DCF39 was producing 599 microvolts per metre here at 1200.

Using GROUNDWAVE 3 :-

Pwr 50KW

Ant. eff 80%

Ground 7

Dist 750Kms (guess)

gives a calculated field strength of 649 microvolts per metre

so perhaps my equipment is not too far out. But of course there are many variables.

Watch the static etc I lost my modem a coule of days ago, grounded the ants. but left modem connected. Wont do it again.

73s Laurie.