Return-Path: Received: from pop3.olsusa.com ([63.150.212.2] verified) by logan.com (CommuniGate Pro SMTP 3.5.6) with ESMTP id 1127825 for rob@logan.com; Wed, 06 Mar 2002 22:44:34 -0500 Received: from mail.indian-creek.net ([209.176.40.9]) by pop3.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-71866U8000L800S0V35) with ESMTP id com for ; Wed, 6 Mar 2002 22:18:03 -0500 Received: from VAIO ([209.176.40.122]) by mail.indian-creek.net with SMTP (IOA-IPAD 2.90a1/96) id 0426900; Wed, 06 Mar 2002 21:20:42 -0600 Message-ID: <000b01c1c587$0e6ac660$7a28b0d1@VAIO> From: "Jim Cameron" To: "Lancair Mail List" Subject: Ground loops (the electric kind) Date: Wed, 6 Mar 2002 21:20:21 -0600 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Mailing-List: lancair.list@olsusa.com Reply-To: lancair.list@olsusa.com <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> To Jack Hickham: Run, don't walk, to Bob Nuckolls' web site (www.aeroelectric.com) and get his book, "The Aeroelectric Connection." All will be revealed! Seriously, this is the freshest breeze to blow through avionics in a long time. His book is packed full of good stuff, including complete electrical system diagrams for everything from stone simple to highly sophisticated systems with dual battery / dual alternator / multi-bus / etc. Briefly, ground loops can occur when you have different things grounded to different points, with some sort of network of wires connecting all the ground points together. Since the real world is non-ideal and real wires have some resistance, current (especially at radio frequencies) flowing to ground at one point can induce wild and not wonderful phenomena in your avionics. Noise is the principal goblin, but there are others. Plan from the start to bring ALL your ground wires to a single point. Bob's "forest of tabs" is a great way to do this, unless you happen to be one of those who think fastons are a commie plot. I've used 'em in two planes with no problems. Again, see articles on Bob's website, and be sure to get the good quality fastons and the proper crimp tool. Jim Cameron N143ES >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://members.olsusa.com/mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please remember that purchases from the Builders' Bookstore assist with the management of the LML. Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>