Return-Path: Received: (qmail 19818 invoked from network); 19 Nov 2004 14:16:02 -0000 Received: from unknown (HELO ptb-spamcore02.plus.net) (192.168.71.3) by ptb-mailstore01.plus.net with SMTP; 19 Nov 2004 14:16:02 -0000 Received: from mailnull by ptb-spamcore02.plus.net with spamcore-l-b (Exim 4.32; FreeBSD) id 1CV9Xu-000E1J-9p for dave@picks.force9.co.uk; Fri, 19 Nov 2004 14:15:33 +0000 Received: from [192.168.67.1] (helo=ptb-mxcore01.plus.net) by ptb-spamcore02.plus.net with esmtp (Exim 4.32; FreeBSD) id 1CV9Xu-000E1A-4x for dave@picks.force9.co.uk; Fri, 19 Nov 2004 14:15:30 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1CV9YM-000CEb-Sk for dave@picks.force9.co.uk; Fri, 19 Nov 2004 14:15:58 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1CV9Y6-0003v4-0q for rs_out_1@blacksheep.org; Fri, 19 Nov 2004 14:15:42 +0000 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1CV9Y5-0003uv-Lp for rsgb_lf_group@blacksheep.org; Fri, 19 Nov 2004 14:15:41 +0000 Received: from anchor-post-33.mail.demon.net ([194.217.242.91]) by relay.thorcom.net with esmtp (Exim 4.41) id 1CV9Xz-00088s-5z for rsgb_lf_group@blacksheep.org; Fri, 19 Nov 2004 14:15:41 +0000 Received: from pickmere.demon.co.uk ([158.152.117.143]) by anchor-post-33.mail.demon.net with esmtp (Exim 4.42) id 1CV9Xw-000EH1-AJ for rsgb_lf_group@blacksheep.org; Fri, 19 Nov 2004 14:15:34 +0000 Message-ID: Date: Fri, 19 Nov 2004 12:03:51 +0000 To: rsgb_lf_group@blacksheep.org From: "M. J. Powell" References: <01C4CE0F.A626D2D0.actalbot@southsurf.com> <5.2.0.9.2.20041119083121.0133eec0@pop.vianw.pt> In-Reply-To: <5.2.0.9.2.20041119083121.0133eec0@pop.vianw.pt> MIME-Version: 1.0 User-Agent: Turnpike/6.01-S () X-SPF-Result: relay.thorcom.net: 194.217.242.91 is neither permitted nor denied by domain of pickmere.demon.co.uk X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,TW_GV=0.077 Subject: Re: LF: Loading Coils Content-Type: text/plain; charset=us-ascii; format=flowed 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-transfer-encoding: 8bit In message <5.2.0.9.2.20041119083121.0133eec0@pop.vianw.pt>, Brian Rogerson writes >The slide rule generation all did it to place the decimal correctly? >Brian CT1DRP Yes. Mike > > > > >At 08:13 19/11/2004, you 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 >> >> >> >>On Friday, November 19, 2004 4:01 AM, WE0H Mike >>[SMTP:we0h@genesiswireless.us] >>wrote: >> > Yes, you have to know what buttons to push to get the right answer. The >> > calculator just helps you to not make as many mistakes if any at all. >> > >> > Mike >> > WE0H >> > >> > G4gvw wrote: >> > >> > >I must confess that after all these years i do find that my >> > >calculator >> with >> > > >> > >all the built-in formulae (ohms law included) has made me lazy but >> maybe the >> > > >> > >skill is in knowing what to calculate and when >> > > >> > >Pat g4gvw >> > > >> > > >> > > > > > -- M.J.Powell