Return-Path: Received: (qmail 54428 invoked from network); 19 Nov 2004 16:18:24 -0000 Received: from unknown (HELO ptb-spamcore02.plus.net) (192.168.71.3) by ptb-mailstore02.plus.net with SMTP; 19 Nov 2004 16:18:24 -0000 Received: from mailnull by ptb-spamcore02.plus.net with spamcore-l-b (Exim 4.32; FreeBSD) id 1CVBSM-000J5P-HX for dave@picks.force9.co.uk; Fri, 19 Nov 2004 16:17:56 +0000 Received: from [192.168.67.2] (helo=ptb-mxcore02.plus.net) by ptb-spamcore02.plus.net with esmtp (Exim 4.32; FreeBSD) id 1CVBSM-000J5K-CL for dave@picks.force9.co.uk; Fri, 19 Nov 2004 16:17:54 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1CVBSo-0005sV-1b for dave@picks.force9.co.uk; Fri, 19 Nov 2004 16:18:22 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1CVBSJ-0004LI-G5 for rs_out_1@blacksheep.org; Fri, 19 Nov 2004 16:17:51 +0000 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1CVBSJ-0004L9-40 for rsgb_lf_group@blacksheep.org; Fri, 19 Nov 2004 16:17:51 +0000 Received: from cmsout02.mbox.net ([165.212.64.32]) by relay.thorcom.net with esmtp (Exim 4.41) id 1CVBSF-0000AN-Aj for rsgb_lf_group@blacksheep.org; Fri, 19 Nov 2004 16:17:51 +0000 Received: from cmsout02 (cmsout02 [165.212.64.32]) by cmsout02.mbox.net (Postfix) with ESMTP id 838724C877 for ; Fri, 19 Nov 2004 16:17:39 +0000 (GMT) Received: from uadvg131.cms.usa.net [165.212.11.131] by cmsout02 via smtad (C8.MAIN.3.16w); Fri, 19 Nov 2004 16:17:39 GMT X-USANET-From: 165.212.11.131 IN dibene@usa.net uadvg131.cms.usa.net Received: from [192.168.0.2] [151.41.157.88] by uadvg131.cms.usa.net (ASMTP/dibene@usa.net) via mtad (C8.MAIN.3.21E) with ESMTP id 203iksqRl0331M31; Fri, 19 Nov 2004 16:17:37 GMT X-USANET-Auth: 151.41.157.88 AUTH dibene@usa.net [192.168.0.2] Message-ID: <419E1CA6.2090802@usa.net> Date: Fri, 19 Nov 2004 17:17:42 +0100 From: Alberto di Bene User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <01C4CE0F.A626D2D0.actalbot@southsurf.com> In-Reply-To: <01C4CE0F.A626D2D0.actalbot@southsurf.com> X-USANET-MsgId: XID203iksqRl0331X31 X-SPF-Result: relay.thorcom.net: 165.212.64.32 is neither permitted nor denied by domain of usa.net X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: Re: Loading Coils Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit 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) Andy, what you say requires intelligence to be done. Intelligence nowadays is a scarce resource, and it is more and more made optional. Who needs it ? When the red lamp glows, just push the yellow button. That's all.... :-( 73 Alberto I2PHD ------------------------------------------- Andy wrote: >When it comes to calculations, the most useful ability is not to be able to >caculate it exactly, caculator or no, but to quickly be able to estimate a ball >park answer or approximation. > >Who needs to know that 22uH at 137kHz has 18.93 ohms reactance. > >Its quicker to think " a bit more than 20 times a bit less than 0.14, times > 6-and-a-bit >... is 2.8 times 6-and-a-bit , so call it 18 ohms" > >And they don't teach that in schools - and never have done, to my knowledge! > >Andy G4JNT >