---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Thu 05/12/11: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:09 AM - Re: Modifying Seat Heater Wiring (Eric M. Jones) 2. 07:43 AM - transponder connections, grounding and RF interference (messydeer) ________________________________ Message 1 _____________________________________ Time: 05:09:41 AM PST US Subject: AeroElectric-List: Re: Modifying Seat Heater Wiring From: "Eric M. Jones" I haven't seen the seat heaters, but a question came to me: Is the back side of the seat heater insulated and reflective? If not, why not? It would use half the power. Eh? -------- Eric M. Jones www.PerihelionDesign.com 113 Brentwood Drive Southbridge, MA 01550 (508) 764-2072 emjones@charter.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=339664#339664 ________________________________ Message 2 _____________________________________ Time: 07:43:05 AM PST US Subject: AeroElectric-List: transponder connections, grounding and RF interference From: "messydeer" I've got a TDR-950 and now have the components ready for connecting it to my MGL Enigma. Connections I have a couple questions about where the wires connect. Bob has the pinout table here, http://www.aeroelectric.com/Installation_Data/TDR950-950L.pdf . Number 2 says 'ext suppr'. I read on VAF, http://www.vansairforce.com/community/showthread.php?t=3414, this is for DME, which I don't have so would leave open. Number 3 is for D4. The Enigma installation manual says, 'If your transponder does not support signals D4 and D2, leave them unconnected.' The transponder doesn't have D2, so do I connect D4 or not? Number 13 is for a 14v dimmer. I'm running a 14V system. On the front of the transponder there is an adjustable knob that says 'dim' and has a curved arrow around the knob. Would 13 go to power? If so, seems I could jump this into number 14, which says 14 volts DC in. Number 15 says 'remote I/D'. The same thread on VAF said to ground this. Is that right? Grounding The pinout table says number 1 goes to ground and MGL says also to ground the xpdr to the encoder connection of the EFIS. The EFIS is also grounded separately from its main connector to the ground bus. Is this the way to do it? I'm concerned about ground loops. I've attached a schematic of what I think they are suggesting, showing just the ground wires. RF interference I've also got a ferrite bead cylinder or two from MGL. Would I loop all the wires from the transponder through one of these, close to the back of the xpdr? Thanks :-) -------- Dan Read this topic online here: http://forums.matronics.com/viewtopic.php?p=339677#339677 Attachments: http://forums.matronics.com//files/transponder_ground_schematic_726.jpg ------------------------------------------------------------------------------------- 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.