---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 03/28/08: 14 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:02 AM - Coax Stripper Clearance (Robert L. Nuckolls, III) 2. 07:32 AM - Re: Just for grins (Ernest Christley) 3. 07:45 AM - Re: Any Ray Allen LED Dimming Circuit ideas? (Glaeser, Dennis A) 4. 09:37 AM - Re: Alternator Breaker Pop (user9253) 5. 10:54 AM - Re: Aux power and the battery (Jim Piavis) 6. 01:22 PM - Re: Re: Aux power and the battery (Robert L. Nuckolls, III) 7. 02:40 PM - Re: Just for grins (Robert L. Nuckolls, III) 8. 02:41 PM - Strippers are all spoken for. (Robert L. Nuckolls, III) 9. 03:36 PM - Re: Strippers are all spoken for. (Kevin Horton) 10. 07:05 PM - AMR-350 pin-out (Michael Hinchcliff) 11. 07:47 PM - Re: Using NC SwitchesElectrical question (Robert Seccombe) 12. 08:57 PM - Re: AMR-350 pin-out (Robert L. Nuckolls, III) 13. 09:08 PM - Re: Strippers are all spoken for. (Robert L. Nuckolls, III) 14. 09:15 PM - Re: Alternator Breaker Pop (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 07:02:06 AM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Coax Stripper Clearance I was looking through some boxes for parts on a client project and ran across some 3-blade, coax wire strippers left over from a time when we were merchandising tools and materials. This tool: http://www.aeroelectric.com/Pictures/Tools/Wire_Strippers/3-Blade_Adjustable_1.jpg produces this strip job: http://www.aeroelectric.com/Pictures/Tools/Wire_Strippers/3-Blade_Adjustable_6.jpg on RG-58/400/141 coax making it ready to install a connector: http://www.aeroelectric.com/Pictures/Tools/Wire_Strippers/3-Blade_Adjustable_9.jpg It's adjustable and comes with the right size Allen wrench to set depths for other styles of coax. I have about a dozen of these and will make them available to folks for $10 each plus $1.30 postage for a total of $11.30 You can place an order on our secure order form at: https://matronics.com/aeroelectric/Catalog/AECcatalog.html Put a note in the comments box that you want a coax stripper. Bob . . . ----------------------------------------) ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ---------------------------------------- ________________________________ Message 2 _____________________________________ Time: 07:32:31 AM PST US From: Ernest Christley Subject: Re: AeroElectric-List: Just for grins Robert L. Nuckolls, III wrote: > > See: > > http://www.aeroelectric.com/Pictures/Curves/300_vs_50mA_discharge_of_AA_cell.jpg > > > A reduction of load to 50 mA allowed me to get twice > the stored energy from the cells chemistry. When designing the battery configuration, I will get more than twice the energy from the system if I wire the batteries in parallel? Could you run a test with 150mA load? That would simulate dual batteries loaded in parallel vs a single battery. ________________________________ Message 3 _____________________________________ Time: 07:45:00 AM PST US Subject: AeroElectric-List: Re: Any Ray Allen LED Dimming Circuit ideas? From: "Glaeser, Dennis A" The LED units have a lead which dims them when connected to 12v. It's an on-off type of thing as far as I know, no way to use a dimming circuit. I'm using the Perihelion Dimmer which has a switched output as well as a dimmed output. I connected the Trim indicators dimmer wire to the switched side, so when I turn on my interior lights, the trim indicators dim. Dennis Glaeser RV7A - first flight planned for tomorrow! --------------------------------------------------- Hello, Panel is all wired up, just some fine tuning. One item is that the Ray Allen LED trim indicators are too bright when switched to =BD brightness. I have scanned the net for a way to convert them to a linear dimming range but have found nothing. I am at point of installing a switch to turn them off except when needed. I am hoping someone has a more elegant (read cheap) solution. They=92re already mounted in the panel so chucking them is not an option. Thanks! Vince H. Idaho ' RV-8 VSB (Very Slow Built) Finish ________________________________ Message 4 _____________________________________ Time: 09:37:53 AM PST US Subject: AeroElectric-List: Re: Alternator Breaker Pop From: "user9253" A wire could be intermittently shorting to ground or there could be an over-voltage condition. Shut off all expensive electronics, then try disconnecting the wire at the master switch that goes to the over-voltage module and see if the problem goes away. If it does, then there could be an over-voltage condition. The battery should help prevent voltage spikes. Does the battery contactor remain energized until the engine stops turning? -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=173273#173273 ________________________________ Message 5 _____________________________________ Time: 10:54:57 AM PST US From: Jim Piavis Subject: AeroElectric-List: Re: Aux power and the battery Along the lines of the current thread, what is the best way to connect the power supply/ charger? Can a 20A charger be connected via the b-lead to sim ulate alternator current to the system, or should the charger always be con nected across the battery. Same for a dedicated power supply? I'm also loo king for a good power supply while I work through the avionics configuratio n and familiarization of the systems. Jim RV-7 Getting Close ________________________________ Message 6 _____________________________________ Time: 01:22:24 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Aux power and the battery At 10:49 AM 3/28/2008 -0700, you wrote: >Along the lines of the current thread, what is the best way to connect the >power supply/ charger? Can a 20A charger be connected via the b-lead to >simulate alternator current to the system, or should the charger always be >connected across the battery. Same for a dedicated power supply? I m also >looking for a good power supply while I work through the avionics >configuration and familiarization of the systems. A "power supply" is generally clean and stable enough to be stand alone energy source for running things in your airplane or on the bench. A "battery charger" may not . . . and the best way to use a charger is to connect it permanently across the battery and then use the battery to run ship's systems. Any of the power supply products rated for an output voltage of "13.8" will be a stand-alone product designed to run loads up to and including it's rated output current. Do a Goggle search on 13.8 power supply and you get a wad of hits. I'd recommend something on the order of 20A or better capability like a Samlex 1223 . . . but there are many serviceable products. See: http://www.nextag.com/13.8vdc-power-supply/search-html http://www.radiodan.com/misc/samlex1223.htm Bob . . . ________________________________ Message 7 _____________________________________ Time: 02:40:57 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Just for grins At 10:27 AM 3/28/2008 -0400, you wrote: > > >Robert L. Nuckolls, III wrote: >> >>See: >> >>http://www.aeroelectric.com/Pictures/Curves/300_vs_50mA_discharge_of_AA_cell.jpg >> >> >>A reduction of load to 50 mA allowed me to get twice >>the stored energy from the cells chemistry. >When designing the battery configuration, I will get more than twice the >energy from the system if I wire the batteries in parallel? Could you run >a test with 150mA load? That would simulate dual batteries loaded in >parallel vs a single battery. EXCELLENT question. Actually, doubling the batteries up in parallel will get you MORE than twice the energy. The reasoning here is that energy lost in the battery's internal resistance is a Watt=I(squared)*R function. Went to the bench an measured one of those same Maxell cells open circuit at 1610 mV. I put a 25 ohm load across the cell and it dropped to 1580 for a difference of 30 millivolts. The load was 1580mV/25ohms = 63mA . Therefor the internal resistance of this cell is 30mV/63mA or about 475 milliohms. Okay, 475 milliohms loaded to 300 mA will drop 140 millivolts and toss off .140v x .3A or 42 milliwats of heat. Now, let us connect two cells in parallel. Each cell now sees 1/2 the total load or .15A x .475 ohms = 71 millivolts drop and .071 x .15 = 10 milliwatts of heating. Considering the two cells in parallel they now each toss off 10 milliwatts for a TOTAL of 20 milliwatts . . . where the single cell was tossing off twice that amount with the same load. Paralleling cells has the effect of paralleling internal resistance (making it go down) while doubling the chemical mass (electrical capacity). Given that current in each internal resistance falls by 1/2, the power dissipated in each falls to 1/4th the original thus allowing both cells to deliver more of their content while doubling their total potential energy as a team. Lowering effective internal resistance is always a good thing for return on investment in electro-chemical energy. Bob . . . ________________________________ Message 8 _____________________________________ Time: 02:41:39 PM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Strippers are all spoken for. Gee guys . . . I didn't expect such a quick response! Thanks. I'll fill your requests in order received and let the late-comers know that they were just too late. These strippers are readily available for only slightly more than what I asked. In fact, I think they're generally 9.95 in the wild . . . but they hit you a bit harder for s/h. Bob . . . ----------------------------------------) ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ---------------------------------------- ________________________________ Message 9 _____________________________________ Time: 03:36:47 PM PST US From: Kevin Horton Subject: Re: AeroElectric-List: Strippers are all spoken for. On 28 Mar 2008, at 17:38, Robert L. Nuckolls, III wrote: > > > Gee guys . . . I didn't expect such a quick response! Thanks. > I'll fill your requests in order received and let the late-comers > know that they were just too late. These strippers are readily > available for only slightly more than what I asked. In fact, > I think they're generally 9.95 in the wild . . . but they > hit you a bit harder for s/h. The problem is that while there may be some very acceptable strippers available for $10, there is also a lot of junk for sale too. When purchasing online, it is hard to tell the jems from the junk. We trust your judgement, so if you tell us that a particular $10 stripper is a jem, people will buy it to avoid having to deal with junk. -- Kevin Horton RV-8 (FInal Assembly) Ottawa, Canada http://www.kilohotel.com/rv8 ________________________________ Message 10 ____________________________________ Time: 07:05:20 PM PST US From: "Michael Hinchcliff" Subject: AeroElectric-List: AMR-350 pin-out Hey guys, does anybody out there have an electronic copy of the Collins Audio Panel (AMR-350) pin-out diagram? If so, can you share it with me? Thanks! Michael H. ________________________________ Message 11 ____________________________________ Time: 07:47:28 PM PST US From: "Robert Seccombe" Subject: Re: AeroElectric-List: Using NC SwitchesElectrical question Gentleman, I have seen this before where someone finds it necessary to be able to activate the IDENT function of the transponder from the control stick. I have to ask: How often does one have to IDENT in one flight, what is the chance of activating it accidentally, and just how far would you really have to reach otherwise? Robert Seccombe 35 years ATP ________________________________ Message 12 ____________________________________ Time: 08:57:28 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: AMR-350 pin-out At 08:58 PM 3/28/2008 -0500, you wrote: >Hey guys, does anybody out there have an electronic copy of the Collins >Audio Panel (AMR-350) pin-out diagram? If so, can you share it >with me? Thanks! > >Michael H. > See: http://www.aeroelectric.com/Installation_Data/ Bob . . . ________________________________ Message 13 ____________________________________ Time: 09:08:41 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Strippers are all spoken for. At 06:28 PM 3/28/2008 -0400, you wrote: > >On 28 Mar 2008, at 17:38, Robert L. Nuckolls, III wrote: >> >> >>Gee guys . . . I didn't expect such a quick response! Thanks. >>I'll fill your requests in order received and let the late-comers >>know that they were just too late. These strippers are readily >>available for only slightly more than what I asked. In fact, >>I think they're generally 9.95 in the wild . . . but they >>hit you a bit harder for s/h. > >The problem is that while there may be some very acceptable strippers >available for $10, there is also a lot of junk for sale too. When >purchasing online, it is hard to tell the jems from the junk. We >trust your judgement, so if you tell us that a particular $10 >stripper is a jem, people will buy it to avoid having to deal with junk. Understand. Those who missed out on the 'sale' are encouraged to see: http://www.gilchrist-electric.com/3-blade-coax-cable-strip.php These are the folks I bought them from at 25 to 50 at a whack when we were selling them. Bob . . . ________________________________ Message 14 ____________________________________ Time: 09:15:48 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Alternator Breaker Pop At 06:22 PM 3/27/2008 -0700, you wrote: > > >I am performing my first engine runs with a Jabiru 3300 powered Zenith >601XL. This is a PM alternator and my wiring is based on the Z16 >architecture using the S704-1 alternator control and crowbar OV >protection. So far everything is working just fine with one >exception. Of the 10 or so engine starts I have made, twice I found the >5A alternator breaker popped. This is the breaker between the main bus >and the master switch. On both occasions, the engine was at idle and I >shut it down then re-started it after a few moments. It was after the >start that I noticed the popped breaker. > >I don't know if the breaker popped on shutdown or during the re-start. In >either case I was able to reset the breaker and all appeared to be OK. > >Anybody have any ideas on what is going on here? All the volt and amp >numbers I have seen are "in the green." Do shutdown or start-ups cause >nuisance pops? The crowbar ov protection module has been known to trip on system noises. I've helped a number of builders track down a noise source that was irritating the OVM-14. How long have you had your OV module? There were some changes about 4-5 years ago that made them more resistant to all but the worst noises. This is a pretty rare condition. It could also be that your particular OVM has a problem. You can send it to me for a checkout and update too if you've had it a very long time. I've not built and sold these for about 6 years but I can help you tame the little beast. 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.