Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-de05.r1000.mx.aol.com (Internet Inbound) with ESMTP id C930738000150; Sun, 21 Aug 2011 14:28:57 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QvCkT-0003ms-Da for rs_out_1@blacksheep.org; Sun, 21 Aug 2011 19:27:53 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QvCkS-0003mj-Sp for rsgb_lf_group@blacksheep.org; Sun, 21 Aug 2011 19:27:52 +0100 Received: from mout4.freenet.de ([195.4.92.94]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QvCkR-0007C6-GK for rsgb_lf_group@blacksheep.org; Sun, 21 Aug 2011 19:27:52 +0100 Received: from [195.4.92.26] (helo=16.mx.freenet.de) by mout4.freenet.de with esmtpa (ID dl4yhf@freenet.de) (port 25) (Exim 4.76 #5) id 1QvCkQ-0000pM-O3 for rsgb_lf_group@blacksheep.org; Sun, 21 Aug 2011 20:27:50 +0200 Received: from blfd-4db1a764.pool.mediaways.net ([77.177.167.100]:1230 helo=[192.168.0.101]) by 16.mx.freenet.de with esmtpsa (ID dl4yhf@freenet.de) (TLSv1:CAMELLIA256-SHA:256) (port 465) (Exim 4.76 #5) id 1QvCkQ-00079o-FZ for rsgb_lf_group@blacksheep.org; Sun, 21 Aug 2011 20:27:50 +0200 Message-ID: <4E514E24.7030205@freenet.de> Date: Sun, 21 Aug 2011 20:27:48 +0200 From: wolf_dl4yhf User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:6.0) Gecko/20110812 Thunderbird/6.0 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> <00f801cc6004$c2282bd0$1502a8c0@Clemens04> <4E513642.9060403@freenet.de> <006601cc6024$05c22340$66a5fe04@ctrask> <001b01cc602c$88403ac0$0401a8c0@xphd97xgq27nyf> In-Reply-To: <001b01cc602c$88403ac0$0401a8c0@xphd97xgq27nyf> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: Re: 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: 0:2:407441408:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d40cd4e514e696ebb X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hi Mal, Am 21.08.2011 20:02, schrieb mal hamilton: > Look at it this way. An air wound coil by itself will induce a voltage into > a radio receiver whereas a ferrite rod by itself will NOT, so the ferrite > rod enhances the air wound coil. Is it a question of defination > I am just trying to look at it logically, and in simplistic terms > g3kev yes, but in simplistic terms nothing stops the ferrite rod to "concentrate" the magnetic field lines (from the surrounding air) inside the ferrite material, caused by the mu_r being much larger than the surrounding air. Regardless of the presence of the coil. Oh well if there's no coil there won't be a voltage being induced in the coil, it that's what the author wanted to say ?! Cheers, Wolf .