---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 04/18/07: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:25 AM - Re: Key start switch/magneto problem (Ralph Hoover) 2. 04:40 AM - Re: ACE9011 (Ken) 3. 06:51 AM - Re: ACE9011 (Robert L. Nuckolls, III) 4. 06:35 PM - PS Engineering PTT issue (Greg Papendick) 5. 08:51 PM - STS hand held (Rick Pearce) ________________________________ Message 1 _____________________________________ Time: 04:25:30 AM PST US From: Ralph Hoover Subject: AeroElectric-List: Re: Key start switch/magneto problem Several avenues exist to isolate this problem. 1. Is the Grand Rapids Tach pick off isolated with a resistor ? If so will grounding the Grand Rapids end kill the Mag. If not you can eliminate the Grand Rapids as the root cause. If it is not isolated check with Grand Rapids for recommendations. 2. With the tach pick off eliminated disconnect the P lead from the Mag and connect an Ohm meter. On the lowest scale the switch should show a short when in the off or left positions. with the switch in both it should be open. Now do the wiggle test. If you do not see a short appear don't quit!! 3. Have you used shielded wire for the switch connection? Visually verify the points where the shield is terminated. Neatness is the key here. Are there any whiskers of the shield loose. Has the center conductor been nicked? 4. Check the length of the wire for damage. If it is pinched or chaffed then you could develop a short. 5. The least likely would be foreign material floating around inside the Mag switch but if nothing else is found I would visually inspect the switch. 6. The last unlikely thing would be a bad Capacitor, Coil or foreign material in the Mag. 7. If the Grand Rapids was not isolated and you isolate it then an intermittent on the GR side may still allow the tach function to fail without killing the mag. If this occurs a similar look at wiring to the GR is in order. The school of thought that it must be in the failure mode to find it is partially true but I suggest that in such a simple installation that the root cause of the problem will be obvious if you look close enough. Remember It's only magic until you understand. -- Ralph C. Hoover RV7A hooverra at verizon dot net ________________________________ Message 2 _____________________________________ Time: 04:40:11 AM PST US From: Ken Subject: Re: AeroElectric-List: ACE9011 Lately there have been a number of large attachments posted. We dial up guys would sure appreciate it if you just put a link to whatever diagram, picture, or pdf so that we can download it at our convenience if we are interested. Or we may already have it on our hard drive. thank you Ken do not archive > Is this unit, (ACE9011), suitable for use on an internal regulated > alternator, and if not, what should I do to reduce my vulnerably to > over voltage on a Van's 60 amp alt? > Thanks, ________________________________ Message 3 _____________________________________ Time: 06:51:30 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: ACE9011 At 07:45 PM 4/17/2007 -0400, you wrote: >Is this unit, (ACE9011), suitable for use on an internal regulated >alternator, and if not, what should I do to reduce my vulnerably to over >voltage on a Van's 60 amp alt? >Thanks, >Sam Marlow No, the AEC9011 is for externally regulated alternators and generators including the permanent magnet systems. An internally regulated alternator either requires modification to bring field control wires to the outside or adding some external means of exercising absolute control over the alternator. See: http://www.aeroelectric.com/articles/Adapting_IR_Alternators_to_Aircraft.pdf If you're interested in using the AEC9004 under development, you can install the interim technique described on the second sheet of the document cited above. This will lay the groundwork for an easily installed AEC9004 system when it becomes available. Bob . . . ________________________________ Message 4 _____________________________________ Time: 06:35:55 PM PST US From: "Greg Papendick" Subject: AeroElectric-List: PS Engineering PTT issue A friend at the airport has a PS Engineering PMA6000 in his Cherokee. It had been working fine but after some work was done under the panel the Pilot could no longer transmit. The intercom works fine but as soon as you press the PTT button the pilots mic stops transmitting. It looks like it could have something to do with the PTT maybe grounding out the Mic audio? Any suggestions on where I might look if the jack is OK? Thanks in advance for any assistance ________________________________ Message 5 _____________________________________ Time: 08:51:38 PM PST US From: "Rick Pearce" Subject: AeroElectric-List: STS hand held I'm a regular on the Matronics Kolb web sight. I have a STS hand held and a Flight Tech ITC-2001-ENRI intercom with Flightcom Blackhawk 50x head sets. I could not find a patch cord to hook up the radio. So I took it to a local aircraft radio repair shop to have one made. The tech. is telling the two are not compatible, all he got was a squeal. Can any one tell me if this is true? I came away with the attuide that he just didn't want to screw with it. If they are compatible does any one have a schematic? ------------------------------------------------------------------------------------- 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.