Return-Path: Received: from mtain-dc02.r1000.mx.aol.com (mtain-dc02.r1000.mx.aol.com [172.29.64.130]) by air-dc10.mail.aol.com (v129.4) with ESMTP id MAILINDC102-862e4bd83da314a; Wed, 28 Apr 2010 09:52:35 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-dc02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 6001D38000082; Wed, 28 Apr 2010 09:52:33 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1O77fr-0000Lv-4H for rs_out_1@blacksheep.org; Wed, 28 Apr 2010 14:51:35 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1O77fq-0000Lm-Jd for rsgb_lf_group@blacksheep.org; Wed, 28 Apr 2010 14:51:34 +0100 Received: from smtp07.online.nl ([194.134.42.52]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1O77fo-00014l-4j for rsgb_lf_group@blacksheep.org; Wed, 28 Apr 2010 14:51:34 +0100 Received: from smtp07.online.nl (localhost [127.0.0.1]) by smtp07.online.nl (Postfix) with ESMTP id 6B58098077 for ; Wed, 28 Apr 2010 15:51:26 +0200 (CEST) Received: from pa3fnytrqxpddu (s5593e077.adsl.wanadoo.nl [85.147.224.119]) by smtp07.online.nl (Postfix) with SMTP for ; Wed, 28 Apr 2010 15:51:26 +0200 (CEST) From: To: Date: Wed, 28 Apr 2010 15:51:26 +0200 Message-ID: MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 In-Reply-To: <38A51B74B884D74083D7950AD0DD85E82A1BE7@File-Server-HST.hst.e-technik.tu-darmstadt.de> Importance: Normal X-MS-TNEF-Correlator: X-Online-Scanned: by Cloudmark authority (on smtp07.online.nl) X-Spam-Score: 0.6 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,NO_REAL_NAME=0.55 Subject: LF: RE: 8,97 kHz active antenna circuit and pictures Content-Type: multipart/mixed; boundary="----=_NextPart_000_000F_01CAE6EA.A8D75320" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.1 required=5.0 tests=FROM_ENDS_IN_NUMS,HTML_30_40, HTML_FONTCOLOR_BLUE,HTML_MESSAGE,NO_REAL_NAME 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-VSS-INFO: 5400.1158/58005 X-AOL-VSS-CODE: clean x-aol-sid: 3039ac1d40824bd83da179ca X-AOL-IP: 193.82.116.20 ------=_NextPart_000_000F_01CAE6EA.A8D75320 Content-Type: multipart/alternative; boundary="----=_NextPart_001_0010_01CAE6EA.A8D9C420" ------=_NextPart_001_0010_01CAE6EA.A8D9C420 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Stefan, looks nice but I suspect you have some im problem in your first stage because off the strong line at 9 KHz,Maby it's better to use a filter= at the input.... 73 Victor -----Oorspronkelijk bericht----- Van: Stefan Sch=E4fer [mailto:owner-rsgb_lf_group@blacksheep.org]Nam= ens Stefan Sch=E4fer Verzonden: woensdag 28 april 2010 12:50 Aan: rsgb_lf_group@blacksheep.org Onderwerp: VLF: 8,97 kHz active antenna circuit and pictures Dear LF,=20 Daniele and others asked for the circuit of my active E field antenn= a that i am using for my grabber. Now i have created a pdf file where you can= find the circuit and a picture of the arrangement and a spectrogram of the currently working circuit. =20 http://www.iup.uni-heidelberg.de/schaefer_vlf/8,97kHz%20active%20E%20f= ield%2 0antenna%20by%20DK7FC.pdf So, if you are interested or want to get some ideas for your own cir= cuit, take a look on it. I hope the link works. So, best 73 and maybe cu this evening there, dreamers. Stefan/DK7FC ------=_NextPart_001_0010_01CAE6EA.A8D9C420 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi=20 Stefan,
 
looks=20 nice but I suspect you  have some im problem in your first stage= because=20 off the strong line at 9 KHz,Maby it's better to use a filter at the= =20 input....
 
73
 
Victor
-----Oorspronkelijk bericht-----
Van:= Stefan Sch=E4fer=20 [mailto:owner-rsgb_lf_group@blacksheep.org]Namens Stefan=20 Sch=E4fer
Verzonden: woensdag 28 april 2010 12:50
Aa= n:=20 rsgb_lf_group@blacksheep.org
Onderwerp: VLF: 8,97 kHz acti= ve antenna=20 circuit and pictures

Dear LF,

Daniele and others asked for the circuit of my= active E=20 field antenna that i am using for my grabber. Now i have created a= pdf file=20 where you can find the circuit and a picture of the arrangement and= a=20 spectrogram of the currently working=20 circuit.

http://www.iup.uni-heidelberg.de/schaefer_vlf/8,97kH= z%20active%20E%20field%20antenna%20by%20DK7FC.pdf

So,=20 if you are interested or want to get some ideas for your own circuit= , take a=20 look on it. I hope the link works.

So, best 73 and maybe cu= this=20 evening there, dreamers.

Stefan/DK7FC

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