Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-de01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 03692380000BF; Fri, 19 Aug 2011 16:20:03 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QuVX8-0002pX-KD for rs_out_1@blacksheep.org; Fri, 19 Aug 2011 21:19:14 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QuVX8-0002pO-87 for rsgb_lf_group@blacksheep.org; Fri, 19 Aug 2011 21:19:14 +0100 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QuVX7-0001i5-1h for rsgb_lf_group@blacksheep.org; Fri, 19 Aug 2011 21:19:14 +0100 Received: from ix.urz.uni-heidelberg.de (cyrus-portal.urz.uni-heidelberg.de [129.206.100.176]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id p7JKJB54001647 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 19 Aug 2011 22:19:12 +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 p7JKJBis011975 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 19 Aug 2011 22:19:11 +0200 Received: from [129.206.205.203] (vpn205-203.rzuser.uni-heidelberg.de [129.206.205.203]) by extmail.urz.uni-heidelberg.de (8.13.4/8.13.1) with ESMTP id p7JKJ9A0028081 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 19 Aug 2011 22:19:10 +0200 Message-ID: <4E4EC552.6070801@iup.uni-heidelberg.de> Date: Fri, 19 Aug 2011 22:19:30 +0200 From: =?ISO-8859-1?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: <7.0.1.0.1.20110819095835.01ba53e8@xtra.co.nz> <4E4D96F0.6050409@iup.uni-heidelberg.de> <1313740427.69106.YahooMailNeo@web111905.mail.gq1.yahoo.com> <1313740947.33597.YahooMailNeo@web111915.mail.gq1.yahoo.com> <4E4E220A.7070706@iup.uni-heidelberg.de> <4E4EC28A.80708@toya.net.pl> In-Reply-To: <4E4EC28A.80708@toya.net.pl> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: Ferrite Receive Antennas Content-Type: text/plain; charset=ISO-8859-1; format=flowed 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-SCOLL-SCORE: 0:2:406603680:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d40c94e4ec57346a2 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hello Piotr, If you need a test signal on LF, i am transmitting right now! Distance is just 801 km ;-) See http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_LF_Grabber.html 73, Stefan/DK7FC Am 19.08.2011 22:07, schrieb Piotr Mlynarski: > Hi Stefan, LF > the rx setup mentioned in my previous mail has been built > yesterday afternoon/evening so it definitely needs > improvements/rearrangements etc.. > first of all i must raise the ferrite from the floor , find more > suitable place an so on.. the voltage gain of the buffer/amplifier > stage is abt 27 dB > the cap in LC consists of three parallel mica capacitors of nominaly > 560 pf each + 500 pf air variable > i do not have a VNA at hand so in fact no serious measurements have > been made. Of course, i will make further experiments > and if i catch any distant signal, sure, will announce here.. :) > > 73, Piotr, sq7mpj > > qth: Lodz/jo91rs/ >