Return-Path: Received: (qmail 9632 invoked from network); 20 Jan 2005 17:51:58 -0000 Received: from unknown (HELO ptb-spamcore01.plus.net) (192.168.71.1) by ptb-mailstore02.plus.net with SMTP; 20 Jan 2005 17:51:58 -0000 Received: from mailnull by ptb-spamcore01.plus.net with spamcore-l-b (Exim 4.32; FreeBSD) id 1CrgRn-000FIv-8X for dave@picks.force9.co.uk; Thu, 20 Jan 2005 17:50:20 +0000 Received: from [192.168.67.1] (helo=ptb-mxcore01.plus.net) by ptb-spamcore01.plus.net with esmtp (Exim 4.32; FreeBSD) id 1CrgRm-000FIk-QX for dave@picks.force9.co.uk; Thu, 20 Jan 2005 17:50:18 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim) id 1CrgTW-00077F-SB for dave@picks.force9.co.uk; Thu, 20 Jan 2005 17:52:07 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1CrgSD-0003aT-Rc for rs_out_1@blacksheep.org; Thu, 20 Jan 2005 17:50:45 +0000 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1CrgSD-0003aK-G5 for rsgb_lf_group@blacksheep.org; Thu, 20 Jan 2005 17:50:45 +0000 Received: from rwcrmhc13.comcast.net ([204.127.198.39]) by relay.thorcom.net with esmtp (Exim 4.43) id 1CrgS9-0004Fv-T8 for rsgb_lf_group@blacksheep.org; Thu, 20 Jan 2005 17:50:45 +0000 Received: from 204.127.197.111 (rwcrwbc16.attbi.com[204.127.197.126]) by comcast.net (rwcrmhc13) with SMTP id <2005012017502001500cm36ne>; Thu, 20 Jan 2005 17:50:20 +0000 Received: from [24.91.21.104] by 204.127.197.111; Thu, 20 Jan 2005 17:50:19 +0000 From: Warren K2ORS/WD2XGJ To: rsgb_lf_group@blacksheep.org Date: Thu, 20 Jan 2005 17:50:19 +0000 Message-Id: <012020051750.11452.41EFEF5A000E97EE00002CBC22058864420B97010D0A020E06979D0E03@comcast.net> X-Mailer: AT&T Message Center Version 1 (Dec 17 2004) X-Authenticated-Sender: bWFyeWphbmVib3lkQGNvbWNhc3QubmV0 X-SPF-Result: relay.thorcom.net: 204.127.198.39 is neither permitted nor denied by domain of comcast.net X-Spam-Score: 1.6 (+) X-Spam-Report: autolearn=no,FORGED_RCVD_HELO=0.05,RCVD_BY_IP=0.024,RCVD_DOUBLE_IP_LOOSE=0,RCVD_NUMERIC_HELO=1.531 Subject: Re: LF: Re: Re: Coil Winding, de VY1JA X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com 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-Spam-Filtered: by PlusNet SpamCORE (v3.00) Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit An article called Low Frequency Coil Q, by Bill Bowers, is reproduced in the > Low Frequency Experimenter's Handbook, Page 65 Be careful ! There is a typo in this article in the Low Frequency Experimenter's Handbook. The equation for D on p.66 reads: D = 6x[lxd^2]^1/4 If you use this equation you cannot reproduce the result shown in the example. The final exponent should be 1/3 not 1/4, the equation should read: D = 6x[lxd^2]^1/3 -- 73 Warren K2ORS/WD2XGJ FN42hi > > > > > Anyway, if anyone can point Jay to Bill Bowers' articles, it would be > > appreciated. > > > > John Andrews > > > An article called Low Frequency Coil Q, by Bill Bowers, is reproduced in the > Low Frequency Experimenter's Handbook, Page 65 > > It probably lives on my system somewhere as an .rtf or.doc file so I can > send it as an e-mail attachment if anyone wants it. > > Peter, G3LDO > >