---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 03/28/09: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:07 PM - ICom headset adapter (eschlanser@yahoo.com) 2. 02:04 PM - Re: Re: EFIS brown out protection (Robert L. Nuckolls, III) 3. 06:18 PM - Re: EFIS brown out protection (Paul Eckenroth) 4. 08:21 PM - Re: EFIS brown out protection (Bill Schlatterer) ________________________________ Message 1 _____________________________________ Time: 01:07:21 PM PST US Subject: AeroElectric-List: ICom headset adapter From: eschlanser@yahoo.com I have a hope that the list can help me find or fabricate a replacement for the headset adapter for my ICom A-5 handheld radio. The problems include an overpriced replacement available from ICom and the lack of a push to talk switch plug in the aftermarket headset adapters for electronics. Thanks, Eric Sent via BlackBerry from T-Mobile ________________________________ Message 2 _____________________________________ Time: 02:04:37 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: EFIS brown out protection >> Does the Dynon shut down its ability to display >> voltages below 12.0? What is the significance of >> knowing a transition across a 12.0 volt threshold? >> >> >> Bob . . . > >I *think* that the original point was that with a 'switcher' feeding >a regulated 13.8v to power the Dynon (being used as an >engine/general electrical system health monitor), the Dynon wouldn't >be able to tell the pilot that the bus voltage had begun to fall due >to alternator or other failures in the electrical system, since >there's no separate voltage monitor input on the Dynon. The 1st >notice would be when the switcher drops off-line & everything goes dark. Duhhh . . . I knew that! Hmmm . . . putting that much hardware between a perfectly good battery (ies) to offset a one-time, 50 mS brownout that occurs before you leave that ground seems like killing ants with a sledge. The obvious, stone simple work-around for equipment not designed to live in the real world of aircraft is to not fire it up until after the the engine starts. The second best is to provide a non-cranking battery to support weak sisters until after engine start. If your design goals call for an architecture with dual batteries anyhow, it seems a simple matter to arrange things so only the main battery is used to crank the engine. Once the engine is running then all features of all appliances can be expected to perform as advertised without having to make "mental adjustments" as to the new meaning of any particular display. If weight, parts count and cost of ownership are weighty features of your design goals, minimizing the amount of stuff to be purchased, installed, maintained and carried around as part of your empty weight should be carefully considered for magnitude of added value. Bob . . . ----------------------------------------) ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ---------------------------------------- ________________________________ Message 3 _____________________________________ Time: 06:18:13 PM PST US Subject: Re: AeroElectric-List: EFIS brown out protection From: Paul Eckenroth Bob Thanks for the heads up concerning the solid state contactor. It does indeed reverse feed when not activated. Does a relay such as S 704-1 act more like a mechanical switch. Would it be reasonable to activate this relay using the start switch. Paul On Fri, Mar 27, 2009 at 6:33 AM, Bob-tcw wrote: > Paul, One alternative to an auxiliary battery for voltage sag protection > is a product we developed at TCW Technologies. Intelligent Power > Stabilizer, IPS, provides regulated power to critical electronics with > battery voltages ranging from 5-15 volts. This product was specifically > developed to keep EFIS, GPS and engine monitors up and running during engine > starting. It weighs less than 1 lb and requires no maintenance. All the > details are avialable at www.tcwtech.com > > Thanks, > Bob Newman > TCW Technologies, LLC. > > > ----- Original Message ----- > *From:* Paul Eckenroth > *To:* aeroelectric-list@matronics.com > *Sent:* Thursday, March 26, 2009 9:33 PM > *Subject:* AeroElectric-List: EFIS brown out protection > > Would an aux battery feed to the E Buss through a solid state contactor > keep the voltage from sagging if the contactor is energized by the starter > switch. The E Buss feed from the Main Buss is through a diode. > > I will appreciate any facts and/ or opinions, > > Paul Eckenroth > N509RV > > * > > href="http://www.matronics.com/Navigator?AeroElectric-List">http://www.matronics.com/Navigator?AeroElectric-List > href="http://forums.matronics.com">http://forums.matronics.com > href="http://www.matronics.com/contribution">http://www.matronics.com/c* > > * > > * > > ________________________________ Message 4 _____________________________________ Time: 08:21:14 PM PST US From: "Bill Schlatterer" Subject: RE: AeroElectric-List: EFIS brown out protection Bob, just curious, easy to see how it might handle a surge but how does it handle a voltage sag from a single battery during starting ?? Thanks Bill S _____ From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Bob-tcw Sent: Friday, March 27, 2009 5:34 AM Subject: Re: AeroElectric-List: EFIS brown out protection Paul, One alternative to an auxiliary battery for voltage sag protection is a product we developed at TCW Technologies. Intelligent Power Stabilizer, IPS, provides regulated power to critical electronics with battery voltages ranging from 5-15 volts. This product was specifically developed to keep EFIS, GPS and engine monitors up and running during engine starting. It weighs less than 1 lb and requires no maintenance. All the details are avialable at www.tcwtech.com Thanks, Bob Newman TCW Technologies, LLC. ----- Original Message ----- From: Paul Eckenroth Sent: Thursday, March 26, 2009 9:33 PM Subject: AeroElectric-List: EFIS brown out protection Would an aux battery feed to the E Buss through a solid state contactor keep the voltage from sagging if the contactor is energized by the starter switch. The E Buss feed from the Main Buss is through a diode. I will appreciate any facts and/ or opinions, Paul Eckenroth N509RV href="http://www.matronics.com/Navigator?AeroElectric-List">http://www.matro nics.com/Navigator?AeroElectric-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c ------------------------------------------------------------------------------------- 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.