Return-Path: Received: from rly-da09.mx.aol.com (rly-da09.mail.aol.com [172.19.129.83]) by air-da01.mail.aol.com (v121_r4.4) with ESMTP id MAILINDA013-a8e49251a926c; Thu, 20 Nov 2008 03:07:05 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-da09.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINDA096-a8e49251a926c; Thu, 20 Nov 2008 03:06:47 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1L34YU-0007Ca-Cl for rs_out_1@blacksheep.org; Thu, 20 Nov 2008 08:06:26 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1L34YT-0007CR-Ut for rsgb_lf_group@blacksheep.org; Thu, 20 Nov 2008 08:06:25 +0000 Received: from pne-smtpout1-sn1.fre.skanova.net ([81.228.11.98]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1L34YT-0003c6-0K for rsgb_lf_group@blacksheep.org; Thu, 20 Nov 2008 08:06:25 +0000 Received: from [127.0.0.1] (62.20.250.99) by pne-smtpout1-sn1.fre.skanova.net (7.3.129) (authenticated as u33233109) id 47A9795004CB9542 for rsgb_lf_group@blacksheep.org; Thu, 20 Nov 2008 09:06:19 +0100 Message-ID: <49251A7B.6050603@telia.com> Date: Thu, 20 Nov 2008 09:06:19 +0100 From: "Johan H. Bodin" User-Agent: Thunderbird 2.0.0.17 (Windows/20080914) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <001e01c94a77$cc1fa780$a402a8c0@Inspiron> <004e01c94a9c$dddbe860$0900a8c0@AM> <1227166876.4925149c95ec8@imp.netikka.net> In-Reply-To: <1227166876.4925149c95ec8@imp.netikka.net> X-Karma: -140: lashback.ubl=-140.0 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Re: 3C85/90 Toroids Content-Type: text/plain; charset=ISO-8859-1 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-IP: 193.82.116.20 X-Mailer: Unknown (No Version) Yes, 3F3 is even better than 3C85/3C90 for power transformation at a few hundred kHz. The 3F3 cores, if coloured, are light blue. Philips sold their ferrite business to Ferroxcube: http://www.ferroxcube.com/ 73 Johan SM6LKM Paul-Henrik wrote: > Have a look at Ferroxcube (Philips) cores of 3F3 material. As far as I can > interpret datasheets for these, they should work fairly well as transformers up > to 500kHz with a DC component and up to 1MHz without DC.