X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 17 Jan 2011 09:57:07 -0500 Message-ID: X-Original-Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120] verified) by logan.com (CommuniGate Pro SMTP 5.3.11) with ESMTP id 4676602 for lml@lancaironline.net; Sun, 16 Jan 2011 17:44:20 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=dfs155@roadrunner.com X-Original-Return-Path: X-Authority-Analysis: v=1.1 cv=Inhw+Jdt7z1D3BivGPfn2aw54OvUEJw5lAn/booRZkE= c=1 sm=0 a=8nJEP1OIZ-IA:10 a=o6wpKKBDZoP350mfIftEZg==:17 a=bQEaMyaYAAAA:8 a=DeKj6-H81Oqgarq0hfIA:9 a=PNBuMiYtS1optLsfracA:7 a=7GzLNc4VKJQARNCIIoYxB_4m8y8A:4 a=wPNLvfGTeEIA:10 a=o6wpKKBDZoP350mfIftEZg==:117 X-Cloudmark-Score: 0 X-Originating-IP: 76.178.186.181 Received: from [76.178.186.181] ([76.178.186.181:3835] helo=dan) by cdptpa-oedge04.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id A7/CC-13137-E94733D4; Sun, 16 Jan 2011 22:43:43 +0000 X-Original-Message-ID: From: "Dan Schaefer" X-Original-To: "Lancair list" Subject: Re: Jim Weir Torroids question X-Original-Date: Sun, 16 Jan 2011 14:43:35 -0800 MIME-Version: 1.0 Content-Type: text/plain; format="flowed"; charset="iso-8859-1"; reply-type="original" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5994 Brian - The ferrite toroidal cores have no orientation preference. Depending on the brand, the color is most likely an identfication mark. The core idenification indicates, among other things, it's characteristics such as inductance per turn, saturation limits, effective frequency range, etc. In use, these inductors see an alternating current (AC) - admittedly, at radio frequencies (RF) - but AC nonetheless, so they look the same to the signal in either direction. Regards, Dan Schaefer (LNC2 driver and retired Electronics Engineer who spent many years designing such magnetic components.) -- I am using the free version of SPAMfighter. We are a community of 7 million users fighting spam. SPAMfighter has removed 861 of my spam emails to date. Get the free SPAMfighter here: http://www.spamfighter.com/len The Professional version does not have this message