Return-Path: Received: (qmail 16737 invoked from network); 29 Nov 2002 16:09:54 -0000 Received: from netmail01.services.quay.plus.net (212.159.14.219) by mailstore with SMTP; 29 Nov 2002 16:09:54 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 857 invoked by uid 10001); 29 Nov 2002 16:09:43 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.70) by netmail01.services.quay.plus.net with SMTP; 29 Nov 2002 16:09:43 -0000 X-SQ: A X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 4.10) id 18HngQ-0002K2-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Nov 2002 16:08:02 +0000 Received: from [147.197.200.9] (helo=hestia.herts.ac.uk) by post.thorcom.com with esmtp (Exim 4.10) id 18HngP-0002Jt-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Nov 2002 16:08:01 +0000 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 18Hnf6-0007Au-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Nov 2002 16:06:40 +0000 Received: from [147.197.232.252] (helo=rsch-15.herts.ac.uk) by gemini.herts.ac.uk with esmtp (Exim 3.33 #1) id 18Hnf5-00051t-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Nov 2002 16:06:39 +0000 Message-ID: <5.1.0.14.0.20021129153952.00a94218@gemini.herts.ac.uk> X-Sender: mj9ar@gemini.herts.ac.uk X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Fri, 29 Nov 2002 16:00:42 +0000 To: rsgb_lf_group@blacksheep.org From: "James Moritz" In-reply-to: <3DE77E14.5060906@verizon.net> References: <8.3082bd21.2b189b74@aol.com> MIME-Version: 1.0 X-MailScanner: No Virus detected Subject: Re: LF: New cores from Micrometals Content-Type: text/plain; charset=us-ascii; format=flowed X-Spam-Status: No, hits=-0.4 required=5.0tests=DEAR_SOMEBODY,IN_REP_TO,REFERENCES,SPAM_PHRASE_00_01version=2.42 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Dear Andre, LF Group, At 09:47 29/11/2002 -0500, you wrote: >does anyone know of a table of equivalency between the Philips cores and >the Micrometal ones? The Micrometals cores are iron dust, whilst the Philips cores usually seen in LF use are ferrites, eg. 3C85 etc. Philips (or presumably Ferroxcube now) do produce iron dust materials , designated 1Pxx and 2Pxx according to the 1991 Philips data book I have here. "xx" is the relative permeability of the material; the 1P04, 1P11, 1P30 series seems to be intended for tuned applications, and are probably quite similar to Micrometals materials with similar permeability, while the higher permeability, higher loss 2P materials are intended for noise supression. However, cores in the 1P materials don't seem to be a standard catalogue item. Cheers, Jim Moritz 73 de M0BMU