Return-Path: Received: from mtain-da08.r1000.mx.aol.com (mtain-da08.r1000.mx.aol.com [172.29.64.80]) by air-md03.mail.aol.com (v129.4) with ESMTP id MAILINMD032-8b7d4d3ed8e1317; Tue, 25 Jan 2011 09:06:25 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-da08.r1000.mx.aol.com (Internet Inbound) with ESMTP id 104EB3800009A; Tue, 25 Jan 2011 09:06:23 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PhjWY-0000It-4e for rs_out_1@blacksheep.org; Tue, 25 Jan 2011 14:05:34 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PhjWX-0000Ik-Ni for rsgb_lf_group@blacksheep.org; Tue, 25 Jan 2011 14:05:33 +0000 Received: from mailout-de.gmx.net ([213.165.64.23]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1PhjWU-0003mX-Qj for rsgb_lf_group@blacksheep.org; Tue, 25 Jan 2011 14:05:33 +0000 Received: (qmail invoked by alias); 25 Jan 2011 14:05:24 -0000 Received: from p5480BC4E.dip.t-dialin.net (EHLO [192.168.0.6]) [84.128.188.78] by mail.gmx.net (mp009) with SMTP; 25 Jan 2011 15:05:24 +0100 X-Authenticated: #21215289 X-Provags-ID: V01U2FsdGVkX1+f98JJ08OfM/EAeagrWet9Kbl2lBgT55v3gp9U31 ED1C+kKPuZkFlt From: "Jurgen Bartels" To: rsgb_lf_group@blacksheep.org Date: Tue, 25 Jan 2011 15:05:22 +0100 MIME-Version: 1.0 Message-ID: <4D3EE6B2.26406.1DFD0FC2@jurgenb2.3sdesign.de> In-reply-to: <4D3EC69A.2000200@iup.uni-heidelberg.de> References: <4D3D95AD.11858.18D895B1@jurgenb2.3sdesign.de>, , <4D3EC69A.2000200@iup.uni-heidelberg.de> X-mailer: Pegasus Mail for Windows (4.41) Content-description: Mail message body X-Y-GMX-Trusted: 0 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: What freq. list can you recommend Content-type: text/plain; charset=ISO-8859-1 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: 3039ac1d40504d3ed8df5bf2 X-AOL-IP: 195.171.43.25 Hello Stefan, > About 16 kHz: Sometimes there appear traces at 16 kHz as well as on 8=20 > kHz but these may be signals caused by some alias effects in the=20 > soundcard, sampling at 48 or 96 kS/s and/or caused by NAA/24 kHz. I am= =20 I use Perseus as the rx, not a soundcard :-) So that rules out those problems. > BTW, it would be interesting to see a 0...24 kHz capture of your RX=20 > antenna, covering one day. How about 2 min samples 30 min apart for 24 hours? I'm recording every 30 minutes for 2 minutes 0-100kHz Those recordings I later can play back and make waterfalls for specific=20 frequencies. That allows me to zoom in on particular events afterwards. However I don't see what happens within the 28 minutes waiting period. I= don't=20 want to record 24h as it would take another 24h to produce waterfalls > I am receiving these traces too, see the lower capture on=20 > http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html and= =20 > ignore the 600 Hz spaced QRM lines, caused by the Heidelbergs's tram SMP= S... I had a look there earlier, but the QRM lines made it hard to read. In your case you could create a SpecLab plug-in that removes these lines= before=20 they are painted. I did a similar thing for a different purpose. That woul= d=20 make your grabber image easier to read. Jurgen Bartels Suellwarden, N. Germany hor. Antennas: 11-ele 45-87MHz 13-ele Band-III, 48-ele UHF, FM: 15.11=20 TV: Winradio G305 / Fly2000 + video noise filter & variable IF BW FM: Downconverter + Perseus + Speclab as WFM demod. MW: staggered 300m Beverage 320=B0, 30 x 4m EWE 320=B0, Winradio & Perseu= s http://dx.3sdesign.de/tv_offset_list.htm http://dx.3sdesign.de/station_list.htm http://fewo.3sdesign.de - Vacation home: DX right at the Northsea coast