---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Tue 08/02/16: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:21 AM - Re: Intermittent Battery Failure (user9253) 2. 09:16 AM - Tin contact finish (Jim Brewer) 3. 12:02 PM - Using the "Poor man's 4-wire milliohmmeter" (Kent or Jackie Ashton) 4. 12:29 PM - PM Alternator (BobbyPaulk@comcast.net) 5. 02:14 PM - Re: Using the "Poor man's 4-wire milliohmmeter" (user9253) 6. 05:07 PM - Re: Using the "Poor man's 4-wire milliohmmeter" (user9253) ________________________________ Message 1 _____________________________________ Time: 06:21:59 AM PST US Subject: AeroElectric-List: Re: Intermittent Battery Failure From: "user9253" There are lots of owners of Rotax powered aircraft in the USA who would replace the Ducati regulator with a Silent Hektik if they could find a dealer willing to sell to USA customers. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=459089#459089 ________________________________ Message 2 _____________________________________ Time: 09:16:07 AM PST US From: Jim Brewer Subject: AeroElectric-List: Tin contact finish To answer the question, "Why a tin contact finish." According to Jim Weir, of Kitplanes Magazine, at a Oshkosh forum this week, the explanation was that you have "wiping contact" that will not corrode. ________________________________ Message 3 _____________________________________ Time: 12:02:56 PM PST US From: Kent or Jackie Ashton Subject: AeroElectric-List: Using the "Poor man's 4-wire milliohmmeter" Hi Bob, I made one of these to troubleshoot a sluggish starter on a Long-EZ from your excellent discussion here http://www.aeroelectric.com/articles/grnding.pdf I suspect I have some bad solder joints in connectors on copper-clad aluminum cables and thinking of the best way to test for excessive resistance. I am thinking: I could test each connector joint by isolating the cable & connector and probing between the clean bare cable and the connector, or Alternatively, perhaps I could test the entire cable run and the solenoids by disconnecting the cable it at the battery and the starter, activating the master and starter solenoids with a portable battery and probing between the battery-end and the starter-end. Or could I disconnect the starter cable at the starter, active the master and starter solenoids with the usual switchology and probe between the battery post and the starter-end of the cables. Does connection to the battery affect the test? Whats your preferred strategy here? Thanks. -Kent ________________________________ Message 4 _____________________________________ Time: 12:29:47 PM PST US From: BobbyPaulk@comcast.net Subject: AeroElectric-List: PM Alternator Bob, Several months ago I sent you the burned coils from my Jabiru 3300 PM alternator. At the time I had not removed the rare earth magnet rotor?? I have since replaced it with a 40 amp alternator and it is a much better system. I soon forgot about it due to age related whatever. Anyway I ran across it today ( while looking for something else ) and was wondering if you were interested in it I would send it to you. I vaguely remember you stating you were working with PM Alts. Bobby Jabiru 3300 260 hrs. ________________________________ Message 5 _____________________________________ Time: 02:14:34 PM PST US Subject: AeroElectric-List: Re: Using the "Poor man's 4-wire milliohmmeter" From: "user9253" Disconnect the starter and replace it with a high wattage load. Connect the negative side of the high wattage load to the starter housing. Turn on the battery contactor and the starter contactor. Connect the RED voltmeter lead to the POSITIVE battery post. Then using the black voltmeter probe, measure the voltage drop at various points between the positive battery post and the high wattage load. Harbor Freight sells a 100 amp battery load tester for $22. http://www.harborfreight.com/100-amp-612v-battery-load-tester-61747.html Read the reviews before buying it. Repeat the above test measuring voltage drop between the negative battery post and the starter housing. Disclaimer: I have never had to perform this test. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=459126#459126 ________________________________ Message 6 _____________________________________ Time: 05:07:32 PM PST US Subject: AeroElectric-List: Re: Using the "Poor man's 4-wire milliohmmeter" From: "user9253" Kent, Of the three methods that you posted, I like #2 the best except that I suggest you disconnect the aircraft battery negative terminal, not the positive terminal. That will allow you to test the positive battery connection too. Method 3 has the problem of aircraft battery current flowing through the cable under test between the battery and the master contactor. That current will affect the test. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=459129#459129 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.