Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-da04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 04DCC380000A0; Wed, 30 May 2012 12:25:59 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SZlgx-0007Yf-3W for rs_out_1@blacksheep.org; Wed, 30 May 2012 17:24:11 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SZlgw-0007YW-GP for rsgb_lf_group@blacksheep.org; Wed, 30 May 2012 17:24:10 +0100 Received: from moutng.kundenserver.de ([212.227.17.8]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1SZlgt-00078a-UD for rsgb_lf_group@blacksheep.org; Wed, 30 May 2012 17:24:09 +0100 Received: from [192.168.2.104] (p548D26B9.dip.t-dialin.net [84.141.38.185]) by mrelayeu.kundenserver.de (node=mrbap3) with ESMTP (Nemesis) id 0LrbdF-1RtF9649ev-013QwY; Wed, 30 May 2012 18:24:06 +0200 Message-ID: <4FC649A5.2080700@legal-medicine.de> Date: Wed, 30 May 2012 18:24:05 +0200 From: pws User-Agent: Mozilla/5.0 (X11; U; Linux i686; de; rv:1.9.2.24) Gecko/20111101 SUSE/3.1.16 Thunderbird/3.1.16 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4FC39CF3.7020701@legal-medicine.de> <003a01cd3cee$0e74a1a0$1502a8c0@Clemens04> <4FC51191.8060004@legal-medicine.de> <4FC51B11.3010907@iup.uni-heidelberg.de> <4FC525DA.9040204@legal-medicine.de> <4FC600C8.40903@dsl.pipex.com> In-Reply-To: <4FC600C8.40903@dsl.pipex.com> X-Provags-ID: V02:K0:oxEC+WPWj7mohvjO0fAK93Id0zJofISlUABgK68hXeR xnAP3aXyPk2TFckff+U9OqOHxqP5G6ltzrzJ87pMGGLJEx3HY1 iI7a55/ZtHoxFPGaiwPWIpa29ERUc8AzC1tlWRqBBJjUUIBPD3 VXtk3XJlX3udCsUTGlm2Lo5ECp2CYkN9j9ovKd3aWPUMOweS4a 2Y9lF5zKzU1srUIlxmKAO4hF794hDFkj+/pHmCafHNIN52xIC3 HAFPvouTvMTek3/+ls8Uf23IcBbgFinIXS4fFt+dwkqOA5V8Pw awMCBQsG1OJEmZ7Ld3p2nu5utaK8Vy/q94HmR6vqw9JWuFbgN4 6yvZNFzw0cgSZXD9ukQNDrnSZ9yOvAVuRdnQzal/P X-Spam-Score: -0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi Chris, You wrote: > ... > Sorry I missed your earlier posts in the change to Yahoo Groups. I'd like > to try a balanced probe - are you using the same circuit (with INA111) as > on the www.vlf.it site or have you modified it? > ... [...] Content analysis details: (-0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [212.227.17.8 listed in list.dnswl.org] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record X-Scan-Signature: e90dcb17768c7e768f13e0721cc1c0c7 Subject: Re: LF: Re: VLF/LF-Preamp Content-Type: text/plain; charset=ISO-8859-15; 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: 0:2:382323520:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d404c4fc64a163fd8 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hi Chris, You wrote: > ... > Sorry I missed your earlier posts in the change to Yahoo Groups. I'd like > to try a balanced probe - are you using the same circuit (with INA111) as > on the www.vlf.it site or have you modified it? > ... O.K. - here's the schematic once again: http://www.df3lp.de/misc/rx/INA111_preamp.png and the datasheet: http://www.ti.com/product/ina111 Indeed this is my 2. prototype. Here's a quick and dirty collection of the first for VLF: http://www.df3lp.de/misc/rx/efield/ Please keep in mind that both are prototypes and there's much room for improvement, especially at the input network. Peter, df3lp