Return-Path: Received: from mtain-dc12.r1000.mx.aol.com (mtain-dc12.r1000.mx.aol.com [172.29.64.140]) by air-db06.mail.aol.com (v129.4) with ESMTP id MAILINDB061-85f24cb210dc3bc; Sun, 10 Oct 2010 15:15:41 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dc12.r1000.mx.aol.com (Internet Inbound) with ESMTP id 82DB738000099; Sun, 10 Oct 2010 15:15:39 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1P51Kx-0001mj-AS for rs_out_1@blacksheep.org; Sun, 10 Oct 2010 20:13:35 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1P51Kw-0001ma-QA for rsgb_lf_group@blacksheep.org; Sun, 10 Oct 2010 20:13:34 +0100 Received: from moutng.kundenserver.de ([212.227.17.10]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1P51Ku-00023U-MF for rsgb_lf_group@blacksheep.org; Sun, 10 Oct 2010 20:13:34 +0100 Received: from home100.df3lp.de (p5B06BE4C.dip.t-dialin.net [91.6.190.76]) by mrelayeu.kundenserver.de (node=mreu1) with ESMTP (Nemesis) id 0MZQZl-1PQHDH2PrZ-00LlL7; Sun, 10 Oct 2010 21:13:26 +0200 Message-ID: <4CB21055.4060502@legal-medicine.de> Date: Sun, 10 Oct 2010 21:13:25 +0200 From: pws User-Agent: Mozilla/5.0 (X11; U; Linux i686; de; rv:1.9.1.11) Gecko/20100714 SUSE/3.0.6 Thunderbird/3.0.6 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4CA5E86D.1070208@iup.uni-heidelberg.de> <6F6098420211436FABB78BE04E5F8FAD@JimPC> <000901cb6215$2db60550$0401a8c0@xphd97xgq27nyf> <4CA7096F.7070307@freenet.de> <4CA7C5EA.5060001@iup.uni-heidelberg.de> <4CAA3CB4.5080600@toya.net.pl> <4CAA5A32.2010106@iup.uni-heidelberg.de> <4CAB9042.3020508@toya.net.pl> <4CABA230.3010304@iup.uni-heidelberg.de> <4CABB715.2000901@toya.net.pl> <2024E84F348A4A039481951F65394FA7@JimPC> <4CB0BBE1.1050500@iup.uni-heidelberg.de> <4CB1C9F1.4000900@legal-medicine.de> <4CB1F3C4.1020805@iup.uni-heidelberg.de> In-Reply-To: <4CB1F3C4.1020805@iup.uni-heidelberg.de> X-Provags-ID: V02:K0:65O/ojHe+h9zZZKVc8Wp64FDlbqPspUzTHBfXqVz1Tg 5TIr/nftwsm/uXt5bmJQHonMxKh7YZ0PW6pCWD1bc5dHi/fOUJ m5MxKihH5MiZxMK22mT2Uh/vzhpUFEP5I+3hc5oXmt2erV6J9D 1wYXS4ecbP2BZaQUE4XlOukBfLcmaSdjyvT0nl9T+iVSrPDwHM OqS0NY4LqMa7vUK2XFe3bAdHIY/baKEwvzo33nyNo4= X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: Re: DK7FC's 7th VLF kite experiment Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit 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: 3039ac1d408c4cb210db4f9f X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) Hi Stefan, You wrote: > ... > How have you found that? By guessing? :-) > ... The only guess was the sample rate used, 48 kHz. (@Daniele: 48/2 = 24 kHz) Many months ago I made some tests with a cheap USB-sound-system running at 48 kHz of sample rate. It has almost no anti-aliasing filters in front. Using a ferrite antenna & 60dB pre-amp (*.*) five higher Nyquist ranges could be seen folded in back and forth - a very special type of "Harmonic Mixing". I had the silly idea of recording all available signals at one shot, forgetting that all horrible local interferences will accumulate too inside 0-24 kHz... http://www.df3lp.de/misc/multinyquist-2.png . 73 from Kiel, Peter