Return-Path: Received: (qmail 7232 invoked from network); 10 Aug 2002 19:32:13 -0000 Received: from marstons.services.quay.plus.net (212.159.14.223) by mailstore with SMTP; 10 Aug 2002 19:32:13 -0000 Received: (qmail 3029 invoked by uid 10001); 10 Aug 2002 19:37:10 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.70) by marstons.services.quay.plus.net with SMTP; 10 Aug 2002 19:37:09 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 17ddeK-0007hi-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 10 Aug 2002 22:19:52 +0100 Received: from cmsrelay01.mx.net ([165.212.11.110] helo=cmsoutbound.mx.net) by post.thorcom.com with smtp (Exim 3.33 #2) id 17ddeJ-0007hd-00 for rsgb_lf_group@blacksheep.org; Sat, 10 Aug 2002 22:19:51 +0100 Received: from cmsapps01.cms.usa.net (HELO cmsoutbound.mx.net) (165.212.11.136) by cmsoutbound.mx.net with SMTP; 10 Aug 2002 19:27:35 -0000 Received: from usa.net [32.97.110.76] by cmsapps01.cms.usa.net (ASMTP/dibene@usa.net) via mtad (CM.1201.1.04A) with ESMTP id 489gHJTbI0426M36; Sat, 10 Aug 2002 19:27:35 GMT Message-ID: <3D55695C.4999366C@usa.net> Date: Sat, 10 Aug 2002 21:28:28 +0200 From: "Alberto di Bene" Organization: None X-Mailer: Mozilla 4.79 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org, lf@amrad.org, lowfer@mailman.qth.net Subject: LF: An Excel sheet to play with toroids References: <17chZQ-13Oc8eC@fwd05.sul.t-online.com> <5.1.0.14.0.20020808182124.00b0a1b0@gemini.herts.ac.uk> <005701c23f26$3e24c720$162565d5@oemcomputer> <17cwaH-07Lv5UC@fwd11.sul.t-online.com> <00ba01c23f35$04d85c20$da2565d5@oemcomputer> <005001c24075$634ae840$788ec9c8@local> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Today I found in my archived files an Excel sheet that computes the number of turns for a given inductance on a given core, and viceversa, made by WA1ION. In my opinion it contained an error, as it used the same formula involving AL, both with ferrite toroids and iron-powder toroids. Amidon gives two different formulas for the two cases. I corrected it, and added a couple of other, maybe useful, functions. If you want to check it, you can download it from here : http://www.weaksignals.com/bin/tcas.xls Please report any errors, thanks 73 Alberto I2PHD