Return-Path: Received: (qmail 14255 invoked from network); 23 Sep 2003 10:43:06 -0000 Received: from netmail02.services.quay.plus.net (212.159.14.221) by mailstore with SMTP; 23 Sep 2003 10:43:06 -0000 Received: (qmail 12822 invoked by uid 10001); 23 Sep 2003 10:43:06 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.70) by netmail02.services.quay.plus.net with SMTP; 23 Sep 2003 10:42:55 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1A1kYG-0003PV-6B for rsgb_lf_group-outgoing@blacksheep.org; Tue, 23 Sep 2003 11:37:48 +0100 Received: from [62.253.162.45] (helo=mta05-svc.ntlworld.com) by post.thorcom.com with esmtp (Exim 4.14) id 1A1kYB-0003PM-Vi for rsgb_lf_group@blacksheep.org; Tue, 23 Sep 2003 11:37:44 +0100 X-Fake-Domain: mikedennison Received: from mikedennison ([80.4.116.83]) by mta05-svc.ntlworld.com (InterMail vM.4.01.03.37 201-229-121-137-20020806) with ESMTP id <20030923102929.HHMP6053.mta05-svc.ntlworld.com@mikedennison> for ; Tue, 23 Sep 2003 11:29:29 +0100 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Tue, 23 Sep 2003 11:28:50 +0100 MIME-Version: 1.0 Message-ID: <3F702E72.19666.E9580D@localhost> In-reply-to: <000701c3811e$7ac5ef20$3704210a@Hugh> X-Mailer: Pegasus Mail for Windows (v4.12a) Content-Description: Mail message body Subject: Re: LF: Pot cores Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=-1.0 required=5.0tests=EMAIL_ATTRIBUTION,IN_REP_TOversion=2.55 X-Spam-Checker-Version: SpamAssassin 2.55 (1.174.2.19-2003-05-19-exp) X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 On 22 Sep 2003 at 16:30, Hugh M0WYE wrote: > While pondering a filter design and playing with a pot core type inductor... > RM6 / RM10 etc. > I wondered: "Why is it called a pot core - it doesn't look much like a pot > ?" > Anyone know how the pot-core got it's name ? > Silly, I know, but one does like to know these things ... I always understood this was short for "potted", and presumably refers to the complete encapsulation of the inductance in ferrite that occurs in most 'pot cores'. It may also be connected with the ceramic (ie pottery) mixed with iron dust to make the ferrite. Mike, G3XDV ==========