X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 26 Sep 2007 08:22:17 -0400 Message-ID: X-Original-Return-Path: Received: from global.delionsden.com ([66.150.29.112] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with ESMTPS id 2352236 for lml@lancaironline.net; Wed, 26 Sep 2007 03:45:49 -0400 Received-SPF: none receiver=logan.com; client-ip=66.150.29.112; envelope-from=n103md@yahoo.com Received: from bmackey by global.delionsden.com with local (Exim 4.62) (envelope-from ) id 1IaRYz-0008Jz-Tx for lml@lancaironline.net; Wed, 26 Sep 2007 03:44:05 -0400 Received: from 69.12.132.145 ([69.12.132.145]) (SquirrelMail authenticated user bmackey) by www.bmackey.com with HTTP; Wed, 26 Sep 2007 00:44:05 -0700 (PDT) X-Original-Message-ID: <30111.69.12.132.145.1190792645.squirrel@www.bmackey.com> X-Original-Date: Wed, 26 Sep 2007 00:44:05 -0700 (PDT) Subject: Lancair Legacy Avionics Master Switch Wiring Question From: "bob mackey" X-Original-To: lml@lancaironline.net User-Agent: SquirrelMail/1.4.9a MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - global.delionsden.com X-AntiAbuse: Original Domain - lancaironline.net X-AntiAbuse: Originator/Caller UID/GID - [32015 2012] / [47 12] X-AntiAbuse: Sender Address Domain - yahoo.com X-Source: X-Source-Args: X-Source-Dir: > My second question, was on wiring a Garmin stack to an avionics > master switch purchased from Lancair. The rocker switch is rated > at 15 amps, needless to say the radio stack runs allitle over > the switch's capacity. I guess I'll have to use a 30 AMP relay > for the switching. Any info. on finding the correct relay to use, > wiring insights, schematics, ect. . . would be appreciated. Keep it simple, use a 30 Amp switch... $3.66 at Digikey for the illuminated (green LED), SPST, 30A, 12V http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=67-1914-ND http://www.lumex.com/pdf/CLS-RO11A12250G.pdf Many others in varying specifications. You probably want at least a 30V rating. This one is only 12V. If you must use a relay, consider a solid state switch instead. http://www.irf.com/product-info/datasheets/data/irf1324s-7ppbf.pdf Smaller, lighter, cheaper, more reliable (if mounted properly), no flyback voltages, 300+ amp rating. With careful design, you could even use these to replace the main contactor and starter relays -- again in a 12V system. Other similar parts would be suitable at higher voltages.