Return-Path: Received: from mtain-mh10.r1000.mx.aol.com (mtain-mh10.r1000.mx.aol.com [172.29.96.222]) by air-db05.mail.aol.com (v127_r1.1) with ESMTP id MAILINDB053-86474b9361032e5; Sun, 07 Mar 2010 03:17:07 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-mh10.r1000.mx.aol.com (Internet Inbound) with ESMTP id 5ABDB380000AA; Sun, 7 Mar 2010 03:17:06 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NoBeO-00042j-Ci for rs_out_1@blacksheep.org; Sun, 07 Mar 2010 08:15:48 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NoBeO-00042a-1y for rsgb_lf_group@blacksheep.org; Sun, 07 Mar 2010 08:15:48 +0000 Received: from mx.omskcity.com ([79.133.160.2]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NoBeL-0002OV-D9 for rsgb_lf_group@blacksheep.org; Sun, 07 Mar 2010 08:15:48 +0000 Received: from noname.nodomain.nowhere (host209.161-133-79.sotline.ru [79.133.161.209]) by mx.omskcity.com (8.13.6/8.13.6) with ESMTP id o278Fe9o003081 for ; Sun, 7 Mar 2010 14:15:41 +0600 (OMST) (envelope-from fitec@omskcity.com) Received: from localhost (fitec@localhost) by noname.nodomain.nowhere (8.8.5/8.8.5) with SMTP id PAA00281 for ; Sun, 7 Mar 2010 15:20:51 GMT X-Authentication-Warning: noname.nodomain.nowhere: fitec owned process doing -bs Date: Sun, 7 Mar 2010 15:20:51 +0000 (GMT) From: "Alexander S. Yurkov" To: rsgb_lf_group@blacksheep.org In-Reply-To: <2CDE578A1E1B49AF96D61BB5D91FA03D@White> Message-ID: MIME-Version: 1.0 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.1.8 (mx.omskcity.com [79.133.160.2]); Sun, 07 Mar 2010 14:15:42 +0600 (OMST) X-Spam-Score: 1.5 (+) X-Spam-Report: autolearn=disabled,DATE_IN_FUTURE_06_12=1.498 Subject: Re: LF: 12 km on Dream(ers) Band Content-Type: TEXT/PLAIN; charset=US-ASCII X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.9 required=5.0 tests=DATE_IN_FUTURE_06_12 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: 3039ac1d60de4b9361025814 X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) On Sat, 6 Mar 2010, Markus Vester wrote: > on two evenings this week, I have transmitted an 8.97 kHz signal from my > LF Marconi at home, and attempted to receive it at various locations. > The experiment was very similar to the one in April 2003, but with a > moderate improvement in ERP and FFT bandwidth. Now on both occasions, > the carrier could be detected at a distance of 12.1 km: > http://www.mydarc.de/df6nm/vlf/vlf_12km.jpg Congradulations, Markus! 12km is well out of near reactive zone. Thus further dictance increasing is not too dificult:-) > Radiated power was thus approximately 1.3 uW (EMRP). > this would imply a noise level on the order of 16 dBuV/m/sqrtHz. This corresponds well with previous mesurements. Regards, Alexander/RA9MB