Return-Path: <owner-rsgb_lf_group@blacksheep.org> Received: from rly-de06.mx.aol.com (rly-de06.mail.aol.com [172.19.170.142]) by air-de07.mail.aol.com (v121_r5.5) with ESMTP id MAILINDE074-4e14981888d350; Thu, 29 Jan 2009 05:44:39 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-de06.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINDE064-4e14981888d350; Thu, 29 Jan 2009 05:44:31 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LSUN2-00021F-82 for rs_out_1@blacksheep.org; Thu, 29 Jan 2009 10:43:40 +0000 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LSUMz-000216-DF for rsgb_lf_group@blacksheep.org; Thu, 29 Jan 2009 10:43:37 +0000 Received: from smtp19.orange.fr ([80.12.242.18]) by relay2.thorcom.net with esmtp (Exim 4.63) (envelope-from <john.rabson@wanadoo.fr>) id 1LSUMv-00064M-Te for rsgb_lf_group@blacksheep.org; Thu, 29 Jan 2009 10:43:36 +0000 Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf1923.orange.fr (SMTP Server) with ESMTP id 66B9C1C000AB for <rsgb_lf_group@blacksheep.org>; Thu, 29 Jan 2009 11:43:22 +0100 (CET) Received: from JR (Mix-Dijon-107-2-134.w193-248.abo.wanadoo.fr [193.248.1.134]) by mwinf1923.orange.fr (SMTP Server) with ESMTP id 966911C000A1 for <rsgb_lf_group@blacksheep.org>; Thu, 29 Jan 2009 11:43:21 +0100 (CET) X-ME-UUID: 20090129104321616.966911C000A1@mwinf1923.orange.fr Message-ID: <200901291143090013.08822D48@smtp.wanadoo.fr> X-Mailer: Courier 3.50.00.09.1098 (http://www.rosecitysoftware.com) (P) Date: Thu, 29 Jan 2009 11:43:09 +0100 From: "John RABSON" <john.rabson@wanadoo.fr> To: rsgb_lf_group@blacksheep.org Mime-Version: 1.0 X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=disabled,AWL=0.054 Subject: LF: Ferrite toroid cores using HEM series materials Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable 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-IP: 193.82.116.20 Maplin have been selling these but their paper catalogue does not seem to gi= ve detailed characteristics and doing an online search of their catalogue is= not practicable as I am typically getting 14.4kb/s on dialup*, which means=20= it takes a minute or more to repaint the page. =20 I tried e-mailing them but have not had a reply. =20 aL is easy to estimate with a few turns and an inductance meter, but I would= like to know more about these materials. Can anyone help, please?=20 John F5VLF *we are promised ADSL in a few weeks but I have been here before =20