Return-Path: Received: from mtain-mp06.r1000.mx.aol.com (mtain-mp06.r1000.mx.aol.com [172.29.193.74]) by air-ma01.mail.aol.com (v129.10) with ESMTP id MAILINMA013-b4f14da5e8ea3df; Wed, 13 Apr 2011 14:18:18 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mp06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 7322C38000163; Wed, 13 Apr 2011 14:18:16 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QA4cW-0001CN-O4 for rs_out_1@blacksheep.org; Wed, 13 Apr 2011 19:16:52 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QA4cW-0001CE-7T for rsgb_lf_group@blacksheep.org; Wed, 13 Apr 2011 19:16:52 +0100 Received: from relay.uni-heidelberg.de ([129.206.100.212]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QA4cU-00087q-Hg for rsgb_lf_group@blacksheep.org; Wed, 13 Apr 2011 19:16:52 +0100 Received: from ix.urz.uni-heidelberg.de (cyrus-portal.urz.uni-heidelberg.de [129.206.100.176]) by relay.uni-heidelberg.de (8.14.1/8.14.1) with ESMTP id p3DIGnbl018091 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 13 Apr 2011 20:16:49 +0200 Received: from extmail.urz.uni-heidelberg.de (extmail.urz.uni-heidelberg.de [129.206.100.140]) by ix.urz.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id p3DIGndJ004571 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 13 Apr 2011 20:16:49 +0200 Received: from [129.206.196.196] (vpn196a.rzuser.uni-heidelberg.de [129.206.196.196]) by extmail.urz.uni-heidelberg.de (8.13.4/8.13.1) with ESMTP id p3DIGkoi031410 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 13 Apr 2011 20:16:48 +0200 Message-ID: <4DA5E899.3060201@iup.uni-heidelberg.de> Date: Wed, 13 Apr 2011 20:16:57 +0200 From: =?ISO-8859-15?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.11) Gecko/20100711 Thunderbird/3.0.6 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4DA4C478.8000300@iup.uni-heidelberg.de> <4DA596F8.7010007@iup.uni-heidelberg.de> <4DA5C918.20403@telus.net> In-Reply-To: <4DA5C918.20403@telus.net> X-MIME-Autoconverted: from 8bit to quoted-printable by relay.uni-heidelberg.de id p3DIGnbl018091 X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: VLF: field strength as a function of frequency curve... Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: quoted-printable X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G x-aol-sid: 3039ac1dc14a4da5e8e707f4 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) Ah OK, sorry Scott. I haven't proved the document, just forwarded the=20 link and checked the first page. Theoretical stuff isn't my central=20 interest, you know ;-) 73, Stefan/DK7FC Am 13.04.2011 18:02, schrieb Scott Tilley: > Hi Stefan/group > > This looks it may be the link or at least a very interesting one: > > http://www.navy-radio.com/manuals/0101-1xx/0101_113-02.pdf > > 73 Scott > VE7TIL > > On 4/13/2011 5:28 AM, Stefan Sch=E4fer wrote: >> VLF, >> >> Am 12.04.2011 23:30, schrieb Stefan Sch=E4fer: >>> VLF, >>> >>> I've just got these graphs by a SWL (or better LWL) out of an=20 >>> unknown paper. >> >> Now i've got the URL for this document: >> >> www.navy-radio.com/manuals/0101-1xx/0101_113-06.pdf >> >> >> 73, Stefan/DK7FC >> >> >> >>> It shows the results of field strength achievements as a function of= =20 >>> the TX frequency for different distances and a given TX power. >>> Have we all known about this? Me not ;-) Now i understand why the=20 >>> military stations are located mostly between 15 and 25 kHz... >>> But 8970 Hz is not much worse, at least distances below 4000 km... >>> >>> But that graph tell me it is rather difficult to reach TF3HZ or=20 >>> 4X1RF on 5170 Hz. Anyway we'll see... >>> >>> 73, Stefan/DK7FC >> >> >