Return-Path: Received: from rokland5.awh.us ([67.15.10.31] verified) by logan.com (CommuniGate Pro SMTP 4.3c1) with ESMTP-TLS id 728212 for flyrotary@lancaironline.net; Mon, 14 Feb 2005 10:26:38 -0500 Received-SPF: none receiver=logan.com; client-ip=67.15.10.31; envelope-from=bob@bob-white.com Received: from bgp01386375bgs.brodwy01.nm.comcast.net ([68.35.160.229]:32934 helo=quail) by rokland5.awh.us with smtp (Exim 4.43) id 1D0i6M-0002Tg-Ae for flyrotary@lancaironline.net; Mon, 14 Feb 2005 09:25:34 -0600 Date: Mon, 14 Feb 2005 08:25:28 -0700 From: Bob White To: "Rotary motors in aircraft" Subject: Re: Bernie update on N19VX (blowing chips) Message-Id: <20050214082528.22873acd.bob@bob-white.com> In-Reply-To: References: X-Mailer: Sylpheed version 1.9.2 (GTK+ 2.4.9; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Antivirus-Scanner: Clean mail though you should still use an Antivirus X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - rokland5.awh.us X-AntiAbuse: Original Domain - lancaironline.net X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - bob-white.com X-Source: X-Source-Args: X-Source-Dir: Hi Bernie, I would be glad to hook the switches up to a scope and test them. If there is an intermittent connection, it should show up. If you want to send them, contact me off list and I will give you my address. Bob White On Mon, 14 Feb 2005 02:19:07 GMT "jbker@juno.com" wrote: > > We suspicion that one of the double pole double throw switches has a > momentary short from the 12 volt side to the ground side, but I can > not confirm it with a voltmeter. The digital voltmeter probably > averages several samples, but I never see a rise when I activate the > switch very slowly. Tried an old analog gage and still could not > identify it. Tracy is convinced that we are hitting the circuit on the > chip with 12 volts to blow it. Now that I have the simple one toggle > switch, no more chips have been blown in nearly an hour of running > over the last two days. With the 3 switches hooked to pin 30 it was > instantaneous death. > > The switches are either from B&C or an orlando aircraft surplus shop. > The two sources for switches appear to come from the same Mexican > supplier, but do not know the details other than appearance. > > Bernie > > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html > > -- http://www.bob-white.com N93BD - Rotary Powered BD-4 (soon)