Return-Path: X-Spam-DCC: paranoid 1170; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.4 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id tA2GV9FL021159 for ; Mon, 2 Nov 2015 17:31:09 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ZtHu4-0008AH-Rb for rs_out_1@blacksheep.org; Mon, 02 Nov 2015 16:24:16 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ZtHu4-0008A8-JZ for rsgb_lf_group@blacksheep.org; Mon, 02 Nov 2015 16:24:16 +0000 Received: from know-smtprelay-omc-6.server.virginmedia.net ([80.0.253.70]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1ZtHt5-000214-G7 for rsgb_lf_group@blacksheep.org; Mon, 02 Nov 2015 16:24:15 +0000 Received: from [192.168.1.6] ([86.31.33.210]) by know-smtprelay-6-imp with bizsmtp id cgNz1r00X4Y1DuW01gNz9Y; Mon, 02 Nov 2015 16:22:59 +0000 X-Originating-IP: [86.31.33.210] X-Spam: 0 X-Authority: v=2.1 cv=P+nH/X0u c=1 sm=1 tr=0 a=jn/JOh/JfiX48zzdjRLp/g==:117 a=jn/JOh/JfiX48zzdjRLp/g==:17 a=NLZqzBF-AAAA:8 a=kj9zAlcOel0A:10 a=CBV8Sz_GAAAA:8 a=oCcaPWc0AAAA:8 a=ghhaU-l1732ifWqXFNEA:9 a=CjuIK1q_8ugA:10 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Mon, 02 Nov 2015 16:22:59 -0000 MIME-Version: 1.0 Message-ID: <56378DE3.5808.166E2A2@mike.dennison.ntlworld.com> In-reply-to: References: <1887849276.20151030143118@chriswilson.tv>, <56378825.5295.1507608@mike.dennison.ntlworld.com>, X-mailer: Pegasus Mail for Windows (4.41) Content-description: Mail message body X-Scan-Signature: 1708620d3ce65bee0beaaede7929769a Subject: Re: Re[2]: LF: Zmag of 45.6 Ohms OK, or should I try for better? Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 4796 The ID is 40mm. It is similar to the one at: http://uk.farnell.com/ferroxcube/tx58-41-18-3c90/ferrite-core-toroid- 3c90/dp/1784191 Mike ==== > Yes, the dimension that actually defines the core cross sectional > area. That's the vital parameter when choosing Nmin for a given > frequency / voltage > > Andy > > > On 2 November 2015 at 15:58, Mike Dennison > wrote: > > > > That is not the core diameter - if it were it would be an ENORMOUS > > > core. > > > > > > > Well, I specified the core type as Chris was originally using a > > > > different type, but of course the size is relevant. The diameter > > > > is 55mm and I use two cores, one on top of the other, to reduce > > > > heat. > > > > 55mm is the OD. Did you need the ID? > > > > Mike > > ==== > > > > > > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2016.0.7163 / Virus Database: 4457/10933 - Release Date: > 11/02/15