---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 01/31/09: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:24 AM - PC Headset compatibility (Lumkes, John H.) 2. 02:09 PM - Re: Bob Nuckolls's Z-14 with dual Lightspeed iii and SD-8 (bcondrey) ________________________________ Message 1 _____________________________________ Time: 07:24:33 AM PST US Subject: AeroElectric-List: PC Headset compatibility From: "Lumkes, John H." Hello, I have a Plantronics Audio 480 headset with a boom mic and noise isolating ear buds and am wondering what it would take (besides the physical connectors) to use it while flying. It seems that computer soundcards do have a bias voltage of 5V for the mic while aircraft are in the range of 8-16V. Will this mic work as is, does it need an adapter, or is it basically hopeless? The earphones differ in impedance but will at least work for a quick test, and I can build an impedance adapter using a simple part from Radio shack. Any thoughts? John Zenith 601HD (forever in process) ________________________________ Message 2 _____________________________________ Time: 02:09:06 PM PST US Subject: AeroElectric-List: Re: Bob Nuckolls's Z-14 with dual Lightspeed iii and SD-8 From: "bcondrey" Food for thought for those with dual LSE ignitions (like me). I was talking with Klaus about his CB recommendation vs fuses and he said that the ignitions (at least the Plasma IIIs that I have) have an internal crowbar circuit to protect the ignition from an overvoltage event. Reason for the CB recommendation was so that in the unlikely case of an OV event the pilot could pull the alternator CBs, reset the ignition CBs and continue flight. This was the first time I'd ever heard this and it scared me A LOT because I've got mine wired through my battery buss fuse blocks (Z-14). While I've never had a problem and haven't heard of anybody else having a problem, I plan to redo the ignition power wiring and switch to CBs. Bob Read this topic online here: http://forums.matronics.com/viewtopic.php?p=227907#227907 ------------------------------------------------------------------------------------- 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.