---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 04/24/15: 14 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:17 AM - Schotke diode (Gary Specketer) 2. 05:33 AM - Re: Schotke diode (Keith C. Borgstrom) 3. 05:53 AM - Re: Schotke diode (rnjcurtis) 4. 08:33 AM - Re: Schotke diode (Charlie England) 5. 09:16 AM - Re: Schotke diode (Gary) 6. 12:18 PM - Kill circuit issue - CDI (George Alexander) 7. 12:34 PM - Re: Kill circuit issue - CDI (Gary Specketer) 8. 01:44 PM - Re: Active VOR antenna () 9. 01:57 PM - Re: Active VOR antenna (Robert L. Nuckolls, III) 10. 04:32 PM - Ideas on a "cost effective " ground power ? (Jeffrey W. Skiba) 11. 05:03 PM - Re: Ideas on a "cost effective " ground power ? (Gary Specketer) 12. 05:55 PM - Re: Ideas on a "cost effective " ground power ? (Jeff Luckey) 13. 06:00 PM - Re: Ideas on a "cost effective " ground power ? (Jeff Luckey) 14. 09:50 PM - Re: Ideas on a "cost effective " ground power ? (RV7ASask) ________________________________ Message 1 _____________________________________ Time: 05:17:14 AM PST US Subject: AeroElectric-List: Schotke diode From: Gary Specketer I was going to install my diode and decided to check it with my ohm meter. To my surprise I get no continuity in any direction any combination of pins. What is up? Gary > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=441207#441207 > > > > > > > > > > ________________________________ Message 2 _____________________________________ Time: 05:33:02 AM PST US From: "Keith C. Borgstrom" Subject: RE: AeroElectric-List: Schotke diode It could be that the batteries in you ohmmeter are too low to provide a high enough voltage to forward-bias the diode. Put fresh batteries in and test it again. Keith -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Gary Specketer Sent: Friday, April 24, 2015 8:14 AM Subject: AeroElectric-List: Schotke diode --> I was going to install my diode and decided to check it with my ohm meter. To my surprise I get no continuity in any direction any combination of pins. What is up? Gary > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=441207#441207 > > > > > > > > > > ________________________________ Message 3 _____________________________________ Time: 05:53:04 AM PST US Subject: Re: AeroElectric-List: Schotke diode From: rnjcurtis Sent from: YOGA TABLET 10 HD+ Gary Specketer wrote: I was going to install my diode and decided to check it with my ohm meter. To my surprise I get no continuity in any direction any combination of pins. What is up? Gary Probably your meter! Many digital meters operate on such a small voltage, when measuring resistance that they don't even have enough to break down the forward junction of the diode, thus indicating a high resistance in both directions. An analog meter is my preference for this task you could use a 1K resistor in series with a battery and put this across the diode. The voltage measured across the resistor will be high when the diode is forward and low when reverse voltage is applied. Roger ________________________________ Message 4 _____________________________________ Time: 08:33:53 AM PST US From: Charlie England Subject: Re: AeroElectric-List: Schotke diode On 4/24/2015 7:49 AM, rnjcurtis wrote: > > > Sent from: YOGA TABLET 10 HD+ > > Gary Specketer wrote: > > > > I was going to install my diode and decided to check it with my ohm meter. To my surprise I get no continuity in any direction any combination of pins. What is up? > > Gary > > > Probably your meter! Many digital meters operate on such a small voltage, when measuring resistance that they don't even have enough to break down the forward junction of the diode, thus indicating a high resistance in both directions. An analog meter is my preference for this task > > you could use a 1K resistor in series with a battery and put this across the diode. The voltage measured across the resistor will be high when the diode is forward and low when reverse voltage is applied. > > Roger > Or just put the digital meter in diode test mode (look for the diode symbol on the selector switch). ________________________________ Message 5 _____________________________________ Time: 09:16:16 AM PST US Subject: Re: AeroElectric-List: Schotke diode From: Gary Ah I wondered about that as it is a cheap harbor freight one and I think it has a coin battery > On Apr 24, 2015, at 8:31 AM, Keith C. Borgstrom wrote: > > > It could be that the batteries in you ohmmeter are too low to provide a high enough voltage to forward-bias the diode. Put fresh batteries in and test it again. > > Keith > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Gary Specketer > Sent: Friday, April 24, 2015 8:14 AM > To: aeroelectric-list@matronics.com > Subject: AeroElectric-List: Schotke diode > > --> > > > I was going to install my diode and decided to check it with my ohm meter. To my surprise I get no continuity in any direction any combination of pins. What is up? > > Gary > > >> >> >> >> >> Read this topic online here: >> >> http://forums.matronics.com/viewtopic.php?p=441207#441207 > > > > > > > > > > ________________________________ Message 6 _____________________________________ Time: 12:18:03 PM PST US Subject: AeroElectric-List: Kill circuit issue - CDI From: "George Alexander" Have a R503 w/DCDI. Engine runs great. Shut down, not so great. Go from Both to Off, engine runs very rough. Return to Both, clears up. Initially suspected (keyed) ignition switch. Clean contacts, used di-electric grease, worked fine for a couple of cycles. Problem returned. Swapped out keyed ignition with 3 position toggles (Off-On-Momentary). Again OK for couple of cycles. Replaced wiring from switches to connectors going to CDI Modules, leaving only the original wires (Yellow/Black) from the CDI modules. Same issue. Unless, I'm missing something and/or someone has a suggestion, it seems to point to one of the modules. Will try the tests described in CPS's Part #58 (resistance readings). Since the indicated reading between the Yellow/Black and anything else is OPEN and I'm looking for Ground to shut down, not sure what this test will show. Don't look forward to replacing the CDI Modules. -------- George Alexander FS II R503 N709FS http://www.oh2fly.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=441246#441246 ________________________________ Message 7 _____________________________________ Time: 12:34:53 PM PST US Subject: Re: AeroElectric-List: Kill circuit issue - CDI From: Gary Specketer One of the things high on my list would be poor connection. Either broken wire or faulty crimp on connector. Gary > On Apr 24, 2015, at 3:16 PM, George Alexander wrote: > > > Have a R503 w/DCDI. Engine runs great. Shut down, not so great. Go from Both to Off, engine runs very rough. Return to Both, clears up. Initially suspected (keyed) ignition switch. Clean contacts, used di-electric grease, worked fine for a couple of cycles. Problem returned. Swapped out keyed ignition with 3 position toggles (Off-On-Momentary). Again OK for couple of cycles. Replaced wiring from switches to connectors going to CDI Modules, leaving only the original wires (Yellow/Black) from the CDI modules. Same issue. > Unless, I'm missing something and/or someone has a suggestion, it seems to point to one of the modules. Will try the tests described in CPS's Part #58 (resistance readings). Since the indicated reading between the Yellow/Black and anything else is OPEN and I'm looking for Ground to shut down, not sure what this test will show. > Don't look forward to replacing the CDI Modules. > > -------- > George Alexander > FS II R503 N709FS > http://www.oh2fly.net > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=441246#441246 > > > > > > > > > > ________________________________ Message 8 _____________________________________ Time: 01:44:54 PM PST US From: Subject: Re: AeroElectric-List: Active VOR antenna Bob, Have you been able to assess the active VOR antenna? We=99re about 30 days from first flight and really need a retrofit VOR antenna solution for this bird as we discussed. Thanks, James From: Robert L. Nuckolls, III Sent: Wednesday, December 03, 2014 11:14 AM Subject: AeroElectric-List: Toroid beads VOR antenna vs. Active VOR antenna I may mount one of this things on my roof and see how it compares with monitor antennas I have for listening to local city, police and fire services. I have one HF active antenna up there already. http://tinyurl.com/ou2ezdy The 'antenna' part of this critter is only a few inches long. I don't have any other HF optimized antennas up yet to compare it to . . . but this 'lump' on the end of a piece of coax hears 'lots of stuff'. Given that the 'stuff' of which VOR is made (high power, line of sight) it seems that our little experiment has a high probability of success for replacing the legacy dipoles and whiskers so favored by our TC brothers. Bob . . . ________________________________ Message 9 _____________________________________ Time: 01:57:35 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Active VOR antenna At 15:43 2015-04-24, you wrote: >Bob, > >Have you been able to assess the active VOR >antenna? Were about 30 days from first >flight and really need a retrofit VOR antenna >solution for this bird as we discussed. > >Thanks, >James It's in the que. I've got some boards to order for another project next week, this board can piggyback onto the 'scrap end' . . . thanks for rattling my cage. All the parts are on hand. Bob . . . ________________________________ Message 10 ____________________________________ Time: 04:32:41 PM PST US From: "Jeffrey W. Skiba" Subject: AeroElectric-List: Ideas on a "cost effective " ground power ? Hello all, I have the circular type ground power connector on my Experimental aircraft , and I am wondering if there is a cost effective Large supply unit (meanin g lots of amps) to be able to run all the electrical whizzes in the aircraf t while completing the build, Radios, multi-function nav screens, even the landing lights etc.... (I have run the battery for this but it dies out aft er about 40 minutes then I have to recharge it for several hours to work on it again and the charge is not designed to power devices :( ) I have seen the typical aircraft ones (like below) but that seems way expen sive..... all I need would be 14volts and I can change the cable end is the re some Bargin out there that will turn on the computer based Devices in th e aircraft while running of normal 110volt ac power from the hanger that I am just missing? [cid:image001.png@01D07EBC.DCFBDF30] I guess another way to ask, is what's in the BOX ? and maybe I could build one myself for Less ??? Thanks to all in advance Jeff. ________________________________ Message 11 ____________________________________ Time: 05:03:02 PM PST US Subject: Re: AeroElectric-List: Ideas on a "cost effective " ground power ? From: Gary Specketer ________________________________ Message 12 ____________________________________ Time: 05:55:33 PM PST US From: Jeff Luckey Subject: Re: AeroElectric-List: Ideas on a "cost effective " ground power ? JeffS, Have you tried a good old fashion battery charger (not a maintainer).=C2- There are lots of chargers that are capable of putting out 10-15 amps whic h should be plenty to keep the avionics & most accessories running.=C2- ( unless you have some need to run the high-current loads for really long per iods of time?) I have an ancient Sears charger that can put out about 15 amps all day long & I use it to float loads when I'm bench testing. A quick goole search found this: Sears.com | =C2- | | =C2- | =C2- | =C2- | =C2- | =C2- | | Sears.comShopYourWay Kmart MyGofer Craftsman Kenmore PartsDirect Land's E nd Sears Home Services Sears Outlet Sell on Sears See all Sears Store Locat or Gift Cards Gift Registry Sears Credit Card Credit Offers | | | | View on www.sears.com | Preview by Yahoo | | | | =C2- | Others on the list may have better recommendations for chargers, -JeffL On Friday, April 24, 2015 5:14 PM, Gary Specketer wrote: ________________________________ Message 13 ____________________________________ Time: 06:00:53 PM PST US From: Jeff Luckey Subject: Re: AeroElectric-List: Ideas on a "cost effective " ground power ? a little cheaper deal here: Schumacher 10/2 Amp Dual-Rate Manual Charger - Walmart.com | =C2- | | =C2- | | =C2- | =C2- | =C2- | =C2- | =C2- | | Schumacher 10/2 Amp Dual-Rate Manual Charger - Walm...Buy Schumacher 10/2 Amp Dual-Rate Manual Charger at Walmart.com | | | | View on www.walmart.com | Preview by Yahoo | | | | =C2- | On Friday, April 24, 2015 5:54 PM, Jeff Luckey w rote: JeffS, Have you tried a good old fashion battery charger (not a maintainer).=C2- There are lots of chargers that are capable of putting out 10-15 amps whic h should be plenty to keep the avionics & most accessories running.=C2- ( unless you have some need to run the high-current loads for really long per iods of time?) I have an ancient Sears charger that can put out about 15 amps all day long & I use it to float loads when I'm bench testing. A quick goole search found this: Sears.com | =C2- | | =C2- | =C2- | =C2- | =C2- | =C2- | | Sears.comShopYourWay Kmart MyGofer Craftsman Kenmore PartsDirect Land's E nd Sears Home Services Sears Outlet Sell on Sears See all Sears Store Locat or Gift Cards Gift Registry Sears Credit Card Credit Offers | | | | View on www.sears.com | Preview by Yahoo | | | | =C2- | Others on the list may have better recommendations for chargers, -JeffL On Friday, April 24, 2015 5:14 PM, Gary Specketer wrote: ________________________________ Message 14 ____________________________________ Time: 09:50:11 PM PST US Subject: AeroElectric-List: Re: Ideas on a "cost effective " ground power ? From: "RV7ASask" http://www.eaavideo.org/video.aspx?v=1009394733001 Here is an EAA video on an alternate power supply. I installed it early in my construction and used it throughout. I have used it often since I started flying as well. I mounted the female end securely to the engine mount just inside the oil access door so I don't have to remove the cowl to put power to the battery. I have a Schumacher 10/2 charger similar to the one already suggested. It is quite happy as long as I keep the power demand down. Regards David Lamb RV7A Read this topic online here: http://forums.matronics.com/viewtopic.php?p=441276#441276 ------------------------------------------------------------------------------------- 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.