---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 08/04/10: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:12 AM - servo filter capacitor (user9253) 2. 07:41 PM - Re: servo filter capacitor (Robert L. Nuckolls, III) 3. 09:07 PM - Re: servo filter capacitor (user9253) 4. 09:48 PM - Re: Re: servo filter capacitor (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 07:12:48 AM PST US Subject: AeroElectric-List: servo filter capacitor From: "user9253" The plans call for a 2200fd capacitor to be connected to the positive power wire at the autopilot servo. The servo is not electrically connected to the aircraft frame at the servo. Instead it has a black negative power wire going back to the instrument panel. Should the negative capacitor lead be connected to aircraft ground at the servo or should it be connected to the black wire? Or does not it matter? Thanks, Joe -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=307464#307464 ________________________________ Message 2 _____________________________________ Time: 07:41:11 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: servo filter capacitor At 09:09 AM 8/4/2010, you wrote: > >The plans call for a 2200fd capacitor to be >connected to the positive power wire at the >autopilot servo. The servo is not electrically >connected to the aircraft frame at the >servo. Instead it has a black negative power >wire going back to the instrument panel. Should >the negative capacitor lead be connected to >aircraft ground at the servo or should it be >connected to the black wire? Or does not it matter? It may not matter. I'm skeptical of any such device hung on the outside of a product. I had to do it once . . . a cabin vent blower speed controller that generated so much noise that we had to bolt a fat electrolytic capacitor to the outside of the housing (UGH!). That's a goof that follows me around and chews on my buns every time I work in forward avionics bay of the King Air. Does anyone put down a reason in writing why this capacitor is necessary? Noise from the actuator? System noises getting into the actuator that upset its operation? Understanding the antagonist/victim/coupling combination that is presumably broken by adding this capacitor is key to wiring it for greatest effectiveness. Who's autopilot are you talking about? Bob . . . ________________________________ Message 3 _____________________________________ Time: 09:07:12 PM PST US Subject: AeroElectric-List: Re: servo filter capacitor From: "user9253" > Does anyone put down a reason in writing why this capacitor is necessary? Noise from the actuator? System noises getting into the actuator that upset its operation? No, there is no explanation. The capacitor came with the kit and is called a "filter" and is to be installed at the servo. > Who's autopilot are you talking about? It is a Dynon servo connected to the FlightDEK-D180 and AP74. Thanks for the reply, Joe -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=307586#307586 ________________________________ Message 4 _____________________________________ Time: 09:48:53 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: servo filter capacitor At 11:05 PM 8/4/2010, you wrote: > > > > Does anyone put down a reason in writing why this capacitor is > necessary? Noise from the actuator? System noises getting into the > actuator that upset its operation? > > >No, there is no explanation. The capacitor came with the kit and is >called a "filter" and is to be installed at the servo. Hmmmm . . . I would hope that their instructions are specific as to where it grounds. Are these Dynon FlightDEK or third party instructions? I think I know a guy at Dynon I can ask about it. Bob . . . ------------------------------------------------------------------------------------- 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.