Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mb06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 033E0380000FB; Thu, 1 Sep 2011 10:18:18 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Qz857-0000eS-28 for rs_out_1@blacksheep.org; Thu, 01 Sep 2011 15:17:25 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Qz856-0000eJ-Mb for rsgb_lf_group@blacksheep.org; Thu, 01 Sep 2011 15:17:24 +0100 Received: from moutng.kundenserver.de ([212.227.126.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Qz854-0000O7-A1 for rsgb_lf_group@blacksheep.org; Thu, 01 Sep 2011 15:17:24 +0100 Received: from [192.168.2.102] (p548D59DD.dip.t-dialin.net [84.141.89.221]) by mrelayeu.kundenserver.de (node=mreu0) with ESMTP (Nemesis) id 0MKMjK-1QxTv00BSI-0020ow; Thu, 01 Sep 2011 16:17:16 +0200 Message-ID: <4E5F93EA.8050704@legal-medicine.de> Date: Thu, 01 Sep 2011 16:17:14 +0200 From: pws User-Agent: Mozilla/5.0 (X11; U; Linux i686; de; rv:1.9.2.18) Gecko/20110616 SUSE/3.1.11 Thunderbird/3.1.11 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <16BC8B3CA8672445BC2A29B4C14A26D4379ED2AAB4@exlnmb01.eur.nsroot.net> <4DF9EFD1.5010208@iup.uni-heidelberg.de> <1313780109.51443.YahooMailNeo@web111907.mail.gq1.yahoo.com> <9CD1E11E8BC9402CB4AECECAC4088443@JimPC> <1314394178.5030.YahooMailNeo@web111905.mail.gq1.yahoo.com> <1314641183.5605.YahooMailNeo@web111910.mail.gq1.yahoo.com> <4E5CBC9A.5020900@iup.uni-heidelberg.de> <1314705226.37125.YahooMailNeo@web111901.mail.gq1.yahoo.com> <4E5CF192.3040905@legal-medicine.de> <1314715132.88047.YahooMailNeo@web111917.mail.gq1.yahoo.com> <4E5CFEEF.6050803@legal-medicine.de> <1314792100.61830.YahooMailNeo@web111911.mail.gq1.yahoo.com> In-Reply-To: <1314792100.61830.YahooMailNeo@web111911.mail.gq1.yahoo.com> X-Provags-ID: V02:K0:WA4LVwvTUufWi1GKlFiNa5HesIqGrN30OcLCTbEkeg3 g3Uht6pVWXJUgrY0HSYJgOT43v68MYiLrxblmVhYSYadrtqW+e 0EbE4YjsVoLtIQNgRPoKl359/ByknEe2JZZu/huqcAQwUbhjHp i9TIlWKxNC8foq3twb20Px/DBQk2JpnLPD0yikxZkbc6tYEGss YKVb6pqYwA2ygq8/2F8r6B2/yPdaj240KxEE8JOEa0ptNngAU0 fGULwQmhwxRs89tBKcU/O+5YRh9uil35MXWwaUhv2caxUIVgLq Dthc8d7682KPa0Y9aXH36ziXjlkYaY3mxG74z6vzCFzXBZ6A0J EYTybN9MMppVgTuW9O7F7+TqSbYLJhX1XUBjV+P3/ X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: Re: Ferrite wideband 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: 0:2:302807488:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d601a4e5f942a2c40 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hi Daniele, You wrote: > ... > is a specific type of wire recommended (or not recommended) for the coil? > ... Very accurate measurements had shown that Litz-Wire is better especially down at low frequencies <1 MHz. Especially MRI-builders reported positive effects. Myself I never could find a considerable difference to solid or multi strand wire. Amongst the crystal radio guys this discussion is not only a running gag, it's a running war... Furthermore some mm of distance between the windings and the core should have a positive effect on "Q". I never checked this but I always have some layers of tape in between. Peter, df3lp