Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mb02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 5C70B38000094; Mon, 15 Aug 2011 12:32:24 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Qt04X-0005ZR-37 for rs_out_1@blacksheep.org; Mon, 15 Aug 2011 17:31:29 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Qt04W-0005ZI-La for rsgb_lf_group@blacksheep.org; Mon, 15 Aug 2011 17:31:28 +0100 Received: from nm3.bt.bullet.mail.ukl.yahoo.com ([217.146.183.201]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1Qt04V-0006dl-Ip for rsgb_lf_group@blacksheep.org; Mon, 15 Aug 2011 17:31:28 +0100 Received: from [217.146.183.197] by nm3.bt.bullet.mail.ukl.yahoo.com with NNFMP; 15 Aug 2011 16:31:21 -0000 Received: from [217.146.183.205] by tm3.bt.bullet.mail.ukl.yahoo.com with NNFMP; 15 Aug 2011 16:31:21 -0000 Received: from [127.0.0.1] by omp1003.bt.mail.ukl.yahoo.com with NNFMP; 15 Aug 2011 16:31:21 -0000 X-Yahoo-Newman-Id: 364.96694.bm@omp1003.bt.mail.ukl.yahoo.com Received: (qmail 94655 invoked from network); 15 Aug 2011 16:31:20 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btinternet.com; h=DKIM-Signature:X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:Received:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:Content-Transfer-Encoding:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=3VUDVtQpuQHJyrsTWtPkFXeJa5ltCCKBWfgk3xwZrA5VmUSx48ByIj/MmihV5xZNAAttUGc7w4xgrFV68yrG+VTP4gcreMSMVuS2+/oThH4kIA1l+FWeIc+4yh4+NnQpAvnwWE53W8srhhESNq4jZE5y5Kn87GIJau6QRk/M09A= ; DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=btinternet.com; s=s1024; t=1313425880; bh=g+ICBUHv70CyhElaBUkSF3aVgCa3taF595p75Fttl3w=; h=X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:Received:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:Content-Transfer-Encoding:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=3zKApUyxkEP/LtnpGfp8OnqEt1P245vnKE6oQf1zNTPUAUMheLkqctE1UFrpqGZh4QfDpm5XEUAWcKmYKYNpryqIOZqfBrBj3PyLwzyR23RwMy8u74zZviEZeYotwpO8NUDpBClK4tGymRnn621O1k70R+D4QOt3/HowlWNTsFs= X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: zpeJaxsVM1mobuH1jgomOFlvxxuNOQlSlZy8JOigLzJUdMg hpvnxN79v5gI9qs7gxk56WaNJ0NBQjrGB33AZtL3XevTk.lWzgO0aFiuOTaT lh0FxUB2XEnjJJ2eOdL9y_xifJDlQggH.7DPxjigt3uLWlvU91tHiZIEm.nr irLzi8Ay4GveMnnGDALIT26iTVArds3kcBMEVKeC5d2ka7PwzEIOalIk_oxw Zq5akqc9uYUuN6kH2ydA8sZfAbXQLx.MPEYvCB8uUX.cjA66UE19mpYsX0G4 yJjdZAX.VfTg7Ms3I3mIg8MtZIyzV3R4GrJcE9mmEwi1yj.fJ7vxUk8gl3mR rBG7vWqiSJ7Kdv3HL.zsliv1uYN_eMsLZJukLNfwj868flu5ONd312s_gE0s Av.o57KS3ReOIjhdygfaAml8Xjke6WqqPn0xiPBk2i2S5p6pzmy07yfEwlJn LaIN9.6pAJISB5PvwkFkRtvgaY8grOPN0gbEi2082Rn33CBej8hkechcjjyz xhkCtIkP8ax5G0YySyuLAlFJKoS2QSuQ- X-Yahoo-SMTP: fpz.2VeswBBs59bVshRPmMN51lcO2lgFRIvE4XTqE8dRwOxd70E- Received: from lark (alan.melia@109.149.53.255 with login) by smtp817.mail.ird.yahoo.com with SMTP; 15 Aug 2011 16:31:20 +0000 GMT Message-ID: <005a01cc5b68$ccbdd0e0$4001a8c0@lark> From: "Alan Melia" To: References: <1313424157.36938.YahooMailClassic@web125707.mail.ne1.yahoo.com> Date: Mon, 15 Aug 2011 17:25:33 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.2001 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.2001 DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,UNPARSEABLE_RELAY=0.001 Subject: Re: LF: Ferrite RX antennas Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit 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: 0:2:484144736:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d306.2 ; domain : btinternet.com DKIM : pass x-aol-sid: 3039ac1d60164e494a180414 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hi again Marcelino, these can be succesful I got hold of a few in the UK a few years back they has longitudinal slots in them. maybe to reduce eddy currents in that application......the ferrite seems about right; I never built a rod antenna with them but did use them for tuning/loading a wire antenna to resonance. Alan G3NYK ----- Original Message ----- From: "Marcelino Garcia" To: Sent: Monday, August 15, 2011 5:02 PM Subject: Re: LF: Ferrite RX antennas Thanks Peter! I don't understand either, after I saw that ad I found a manufacturer of ferrite rods here in Argentina that makes large ferrite rods for high frequency welding machines, up to 40mm diameter, but not as long, up to 20cm only, http://www.futurotrading.com/facetados_EN.html maybe there are similar manufacturers of these rods in Europe. 73, Marcelino - LU7DSU --- El lun 15-ago-11, pws escribió: Hi Marcelino, Be welcome! You wrote: > ... > http://www.stormwise.com >... Fine pieces, but: "Sales to USA only" =:( (I never understood why...) Peter, df3lp