Return-Path: Received: from [65.33.166.167] (account ) by logan.com (CommuniGate Pro WebUser 4.0) with HTTP id 1847999 for ; Tue, 29 Oct 2002 18:36:14 -0500 From: "Marvin Kaye" Subject: Re: [FlyRotary] Re: Alternators .... To: flyrotary X-Mailer: CommuniGate Pro Web Mailer v.4.0 Date: Tue, 29 Oct 2002 18:36:14 -0500 Message-ID: In-Reply-To: <001c01c27f55$9ade41c0$1702a8c0@WorkGroup> MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format="flowed" Content-Transfer-Encoding: 8bit Posted for "Ed Anderson" : Ken, I am not aware of any. I presume by examining a diagram of the rectifying diodes in an alternator that you might be able to determine whether there is a path for excitation voltage (a Sneak Circuit) other than the terminal to the field coil. Another way might be to apply B+ voltage to the altenator output (but not the field coil) and then with a voltmeter determine whether there is any voltage showing up at the field coil terminal. If voltage shows up then that would indicate to me that there is a path for voltage from the output of the alternator to the field coil internally, so it would be self exciting. Thats my best hack at your question. Ed >>Is there any way to determine if an internal reg > alternator will act like yours without spinning it up and testing it?