X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [69.171.58.236] (account marv@lancaironline.net) by logan.com (CommuniGate Pro WebUser 5.0.9) with HTTP id 1074010 for lml@lancaironline.net; Wed, 19 Apr 2006 22:57:52 -0400 From: "Marvin Kaye" Subject: Re: [LML] Re: Avionics=Black Art To: lml X-Mailer: CommuniGate Pro WebUser v5.0.9 Date: Wed, 19 Apr 2006 22:57:52 -0400 Message-ID: In-Reply-To: <002401c66373$52ed4c70$650610ac@jacky0da39824a> References: <002401c66373$52ed4c70$650610ac@jacky0da39824a> X-Priority: 3 MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format="flowed" Content-Transfer-Encoding: 8bit Posted for "Tom Gourley" : Sounds like a good plan. I would try to get as many shields as possible to terminate in the same general area, make a bus out of copper, attach the shield terminations to that bus, and then run a heavy conductor from the bus to the negative battery terminal, or perhaps to a central ground bus that has a low impedance (i.e. large gauge wire direct routed wire) path to the battery. As Brent pointed out the battery is the best noise filter in the airplane. There are probably as many techniques and opinions on how to wire in the shield as there are readers on the LML but the one I use is to fold the shield back over the the outer jacket of the wire bundle, solder a wire to it, and then put heatshrink over it. Just remember that a coax is a special case and its shield must be connected to the body of the BNC connector, or in some cases SMA connector, on both ends of the coax. Tom Gourley