Return-Path: Received: (qmail 25423 invoked from network); 5 Apr 2002 15:25:45 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Apr 2002 15:25:45 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 28291 invoked from network); 5 Apr 2002 15:25:44 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 5 Apr 2002 15:25:44 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16tWy1-00043n-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 05 Apr 2002 17:53:37 +0100 Received: from mail2.cc.kuleuven.ac.be ([134.58.10.50]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16tWy0-00043e-00 for rsgb_lf_group@blacksheep.org; Fri, 05 Apr 2002 17:53:36 +0100 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail2.cc.kuleuven.ac.be (8.12.1/8.12.1) with SMTP id g35FEtr7092610 for ; Fri, 5 Apr 2002 17:14:56 +0200 Message-ID: <3.0.1.16.20020405160954.2c2fc068@pb623250.kuleuven.be> X-Sender: pb623250@pb623250.kuleuven.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Fri, 05 Apr 2002 16:09:54 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: LF: still more loop inductance formulas In-reply-to: <3484.020404@dx.ru> References: <5.1.0.14.0.20020403155037.00acdf78@gemini.herts.ac.uk> <5.1.0.14.0.20020403155037.00acdf78@gemini.herts.ac.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: First of all my appologies to those getting bored with my loop inductance formulas. But after some 'playing' with simulation software and calcuations it turned out that there might be a more accurate and simpler formula to calculate the inductance of a big loop : L = 0.8*B*(ln(A/d)+6.82) where L = loop inductance in uH, A = loop height in m, B = loop length in m and d = wire diamater in mm At first sight there seems no (practical) limits to the A/B ratio. If this formula is correct it would also mean that (for a given height) the loop inductance increase linear with the loop length. 73 from a sunny Belgium (sunny and 22°C ... instead of the rain, wind and 10°C we usually have begin april) Rik ON7YD