---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Thu 07/08/21: 11 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:55 AM - Buy New Apple iPhone 12 Pro 5G 512GB Unlocked $1,149 (jeiaery) 2. 09:41 AM - Re: Melted battery contractor ground wire (frank3) 3. 09:47 AM - Re: (Roger & Jean) 4. 09:55 AM - Re: Melted battery contractor ground wire (frank3) 5. 10:06 AM - Re: Re: Melted battery contractor ground wire (Jeff Luckey) 6. 10:31 AM - Re: (Sebastien) 7. 10:42 AM - Re: Re: Melted battery contractor ground wire (Charlie England) 8. 11:00 AM - Re: Melted battery contractor ground wire (user9253) 9. 02:26 PM - Re: Magnetized Dynon D100 Display (cskelt) 10. 03:36 PM - Re: Melted battery contractor ground wire (frank3) 11. 04:32 PM - Re: Re: Melted battery contractor ground wire (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 04:55:17 AM PST US Subject: AeroElectric-List: Buy New Apple iPhone 12 Pro 5G 512GB Unlocked $1,149 From: "jeiaery" The Price is Canadian dollar. Visit Our Website www.esellibuy.com Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502744#502744 ________________________________ Message 2 _____________________________________ Time: 09:41:40 AM PST US Subject: AeroElectric-List: Re: Melted battery contractor ground wire From: "frank3" Bob's questions answered: 1. Yes, the contactor has been functioning for a couple of months. I've been using jumper cables to connect a lawn tractor battery so I can test components as they are installed. 2. The measured resistance is 16.5 ohms, small terminal to battery side fat terminal with diode removed. (The 0.016 value reported and questioned by Charlie was using the wrong range). 3. There is no continuity between any of the terminals and the case. 4. This is a three terminal Cole Hersee provided by Vans Aircraft. 5. There was a spike supression diode installed, provided by Vans with terminals and shrink tube insulation already installed. I peeled back the insulation to ensure the diode was installed properly, with the band towards the fat terminal. As you suggested, the diode is now nonfunctional. Bob, the contactor is in the mail. As Doug suggested (6 Jul #11) I went through the suggested process to test the wiring and switch. Both were TRUE--both wiring and switch were proper. BTW, I don't understand how a miss-wired switch could cause a direct short. My understand is the switch simply enables the circuit to conduct current or not. I can see the possibility of a short between the switch and the airframe but don't understand miss-wiring. Something I need educating about? Jeff, I submitted the pic with contactor installed. We'll see if it gets published. Joe (7 Jul #5), you interpreted my post correctly. After reviewing schematics I see I WAS lucky! (Might just as well connected the two jumper cables!!! Just talking to myself) Charlie (7 Jul #4), thanks for suggesting the video on battery contractors. It was wired per the video. What you describe re: open circuits & resistance between the terminals is what I was getting. I must not have described clearly. And, as stated above, you were right to be suspicious of my #, I used the wrong range. Again, thanks to all for their interest, questions, and suggestions. -------- Frank McDonald Kitfox S7 - sold RV7 in progress Acworth, GA Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502751#502751 ________________________________ Message 3 _____________________________________ Time: 09:47:09 AM PST US From: Roger & Jean Subject: RE: AeroElectric-List: V2h5IGRvZXMgdGhpcyBnYXJiYWdlIGtlZXAgYXBwZWFyaW5nIG9uIHRoZSBBZXJvRWxlY3RyaWMg TGlzdD8NCg0KDQoNCg0KRnJvbTogamVpYWVyeQ0KU2VudDogV2VkbmVzZGF5LCBKdWx5IDcsIDIw MjEgMTA6MzMgUE0NClRvOiBhZXJvZWxlY3RyaWMtbGlzdEBtYXRyb25pY3MuY29tDQpTdWJqZWN0 OiBBZXJvRWxlY3RyaWMtTGlzdDogQnV5IE5ldyBBcHBsZSBpUGhvbmUgMTIgUHJvIDVHIDI1NkdC IE9yaWdpbmFsIFVubG9ja2VkICQ5NDkNCg0KLS0+IEFlcm9FbGVjdHJpYy1MaXN0IG1lc3NhZ2Ug cG9zdGVkIGJ5OiAiamVpYWVyeSIgPGplaWFlcnlAODJ1bHRyYS5jb20+DQoNClRoZSBQcmljZSBp cyBDYW5hZGlhbiBkb2xsYXIuIFZpc2l0IE91ciBXZWJzaXRlIHd3dy5lc2VsbGlidXkuY29tDQoN Cg0KDQoNClJlYWQgdGhpcyB0b3BpYyBvbmxpbmUgaGVyZToNCg0KaHR0cDovL2ZvcnVtcy5tYXRy b25pY3MuY29tL3ZpZXd0b3BpYy5waHA/cD01MDI3NDMjNTAyNzQzDQoNCg0KDQoNCg0KDQpfLT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PQ0KXy09ICAgICAgICAgIC0gVGhlIEFlcm9FbGVjdHJpYy1MaXN0IEVtYWlsIEZvcnVtIC0NCl8t PSBVc2UgdGhlIE1hdHJvbmljcyBMaXN0IEZlYXR1cmVzIE5hdmlnYXRvciB0byBicm93c2UNCl8t PSB0aGUgbWFueSBMaXN0IHV0aWxpdGllcyBzdWNoIGFzIExpc3QgVW4vU3Vic2NyaXB0aW9uLA0K Xy09IEFyY2hpdmUgU2VhcmNoICYgRG93bmxvYWQsIDctRGF5IEJyb3dzZSwgQ2hhdCwgRkFRLA0K Xy09IFBob3Rvc2hhcmUsIGFuZCBtdWNoIG11Y2ggbW9yZToNCl8tPQ0KXy09ICAgLS0+IGh0dHA6 Ly93d3cubWF0cm9uaWNzLmNvbS9OYXZpZ2F0b3I/QWVyb0VsZWN0cmljLUxpc3QNCl8tPQ0KXy09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT0NCl8tPSAgICAgICAgICAgICAgIC0gTUFUUk9OSUNTIFdFQiBGT1JVTVMgLQ0KXy09IFNhbWUg Z3JlYXQgY29udGVudCBhbHNvIGF2YWlsYWJsZSB2aWEgdGhlIFdlYiBGb3J1bXMhDQpfLT0NCl8t PSAgIC0tPiBodHRwOi8vZm9ydW1zLm1hdHJvbmljcy5jb20NCl8tPQ0KXy09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0NCl8tPSAgICAg ICAgICAgICAgLSBORVcgTUFUUk9OSUNTIExJU1QgV0lLSSAtDQpfLT0gQWRkIHNvbWUgaW5mbyB0 byB0aGUgTWF0cm9uaWNzIEVtYWlsIExpc3QgV2lraSENCl8tPSAgIC0tPiBodHRwOi8vd2lraS5t YXRyb25pY3MuY29tDQpfLT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PQ0KXy09ICAgICAgICAgICAgIC0gTGlzdCBDb250cmlidXRpb24g V2ViIFNpdGUgLQ0KXy09ICBUaGFuayB5b3UgZm9yIHlvdXIgZ2VuZXJvdXMgc3VwcG9ydCENCl8t PSAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC1NYXR0IERyYWxsZSwgTGlzdCBBZG1pbi4N Cl8tPSAgIC0tPiBodHRwOi8vd3d3Lm1hdHJvbmljcy5jb20vY29udHJpYnV0aW9uDQpfLT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQ0K DQoNCg0KDQo ________________________________ Message 4 _____________________________________ Time: 09:55:40 AM PST US Subject: AeroElectric-List: Re: Melted battery contractor ground wire From: "frank3" Don't know if this is relevant but checked the fuses to all the circuits and found the 5amp fuse to the Dynon EFIS was blown. EFIS was only open circuit at the time of the incident. Evidence there must have been some kind of over voltage event, I guess. New fuse and using EBUS circuit I found the EFIS is good to go. -------- Frank McDonald Kitfox S7 - sold RV7 in progress Acworth, GA Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502753#502753 ________________________________ Message 5 _____________________________________ Time: 10:06:49 AM PST US From: Jeff Luckey Subject: Re: AeroElectric-List: Re: Melted battery contractor ground wire Is it possible that you inadvertently hooked-up the battery backwards that day? On Thursday, July 8, 2021, 10:02:12 AM PDT, frank3 wrote: Don't know if this is relevant but checked the fuses to all the circuits an d found the 5amp fuse to the Dynon EFIS was blown.=C2- EFIS was only open circuit at the time of the incident.=C2- Evidence there must have been s ome kind of over voltage event, I guess. New fuse and using EBUS circuit I found the EFIS is good to go. -------- Frank McDonald Kitfox S7 - sold RV7 in progress Acworth, GA Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502753#502753 - S - WIKI - - =C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin. ________________________________ Message 6 _____________________________________ Time: 10:31:02 AM PST US From: Sebastien Subject: Re: AeroElectric-List: I'm surprised you are surprised. Spam is a small problem right now compared to what is coming. Currently, large sections of the internet are constantly under attack by advertisers and criminals. I was a moderator on one of the world's biggest aviation forums and for every legitimate new member who joined and posted, there were 10 ads or scams. In order to prevent the board from being completely flooded, we had to block all new user's posts from being visible until a moderator had checked it and decided whether or not it was legitimate. This means that the spammers and scammers found it worthwhile to create new accounts (as laborious a process as we could reasonably make it) and then post dozens of messages from that account despite 99.999% of those messages never being visible to anyone. Every once in a while there was a real human involved in trying to get spam through and sometimes they succeeded, usually by copying an existing post. Right now the flood is being kept at bay fairly easily by a few minor inconveniences for new users and a lot of effort by unpaid volunteers. Keep in mind though that there is an almost unlimited amount of money being spent on programming AI systems that will get much, much better at pretending to be humans on the internet. Right now, over half of all emails in the world are spam. In the next 50 years I think we will see 99% of internet traffic turn into AI systems trying to figure out ways to advertise and scam the humans still trying to enjoy this technology. It's going to get to the point where the only way you will be allowed to communicate with anyone over the internet (and phone system for that matter) will be to have someone already in the system vouch for you. Unless you know someone who can physically confirm that you exist and can pass that introduction on to others, it will be assumed that you're an AI and you will be blocked. On Thu, Jul 8, 2021 at 9:52 AM Roger & Jean wrote: > Why does this garbage keep appearing on the AeroElectric List? > > > *From: *jeiaery > *Sent: *Wednesday, July 7, 2021 10:33 PM > *To: *aeroelectric-list@matronics.com > *Subject: *AeroElectric-List: Buy New Apple iPhone 12 Pro 5G 256GB > Original Unlocked $949 > > > > > The Price is Canadian dollar. Visit Our Website www.esellibuy.com > > > Read this topic online here: > > > http://forums.matronics.com/viewtopic.php?p=502743#502743 > > ________________________________ Message 7 _____________________________________ Time: 10:42:39 AM PST US Subject: Re: AeroElectric-List: Re: Melted battery contractor ground wire From: Charlie England My 1st thought, as well. That would explain smoking the spike suppression diode on the contactor. Must have been God's Own suppression diode, though, to take the wire with it. Charlie On 7/8/2021 12:06 PM, Jeff Luckey wrote: > Is it possible that you inadvertently hooked-up the battery backwards > that day? > > On Thursday, July 8, 2021, 10:02:12 AM PDT, frank3 > wrote: > > > > > > Don't know if this is relevant but checked the fuses to all the > circuits and found the 5amp fuse to the Dynon EFIS was blown. EFIS > was only open circuit at the time of the incident. Evidence there > must have been some kind of over voltage event, I guess. > > New fuse and using EBUS circuit I found the EFIS is good to go. > > -------- > Frank McDonald > Kitfox S7 - sold > RV7 in progress > Acworth, GA > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=502753#502753 > > > > http://www.matronics.com/Navigator?AeroElectric-; - MATRONICS > WEB FORUMS - > http://forums.matronbsp; - NEW MATRONICS LIST WIKI - > http://wiki.matronics.com > http://www.matronics.com/contributi===================== > > -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 8 _____________________________________ Time: 11:00:00 AM PST US Subject: AeroElectric-List: Re: Melted battery contractor ground wire From: "user9253" I think that jluckey has solved the problem. Reverse battery polarity explains the melted wire and the blown fuse. Luckily the EFIS was not damaged. I predict that Bob N will not find anything wrong with the contactor. An over voltage event is extremely unlikely without an alternator running. It is pretty easy to reverse battery voltage when using jumper cables. One has a 50-50 chance of getting it wrong. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502757#502757 ________________________________ Message 9 _____________________________________ Time: 02:26:15 PM PST US Subject: AeroElectric-List: Re: Magnetized Dynon D100 Display From: "cskelt" The mystery of the magnetized EFIS has been solved. Don Jones of Dynon Technical Support offered to send me a remanufactured D100 EFIS to swap out and to test mine at their shop. I determined that the replacement had barely measurable permanent magnetism in the same location as the original, but it was not enough to affect the panel mount compass nearby. I installed it in the panel, did an approximate compass swing using our local taxiway centerlines as a reference for the cardinal pointsclose enough for our purposes as magnetic deviation is minimal here. The figure shows good agreement in cruise between EFIS and panel mount compass. No doubt a more rigorous compass swing would improve things further. Don sent me his findings. I have looked into the magnetized D100. As you noted, it is the LCD that is the source. More specifically the thin stainless frame around the LCD. Early version LCD's (like yours) apparently have a stainless alloy frame that can be magnetized, later versions (bright screen models) have a better stainless alloy and won't stick to a magnet. The replacement we sent has the later version. The panel mounted compass reads the same whether the master switch and avionics switches are on or off, and whether or not the engine is running. Carefully following Bob's guidelines in the Aero-Electric Connection while building no doubt helped! It should go without saying that I couldnt be happier with Dynons support, the performance of the replacement unit, and that Im confident the problem wont return. Many thanks to Don for his follow up that led to a successful conclusion. Chris Skelt LNC2 at IWS. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502758#502758 Attachments: http://forums.matronics.com//files/reman_efis_works_260.png ________________________________ Message 10 ____________________________________ Time: 03:36:35 PM PST US Subject: AeroElectric-List: Re: Melted battery contractor ground wire From: "frank3" That's always a possibility, I suppose. Maybe Bob postmortem will shed some light on your supposition. Thanks for supposing a new idea thread. -------- Frank McDonald Kitfox S7 - sold RV7 in progress Acworth, GA Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502760#502760 ________________________________ Message 11 ____________________________________ Time: 04:32:12 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Melted battery contractor ground wire At 12:59 PM 7/8/2021, you wrote: > >I think that jluckey has solved the problem. Reverse battery >polarity explains the melted wire and the blown fuse. Luckily the >EFIS was not damaged. >I predict that Bob N will not find anything wrong with the >contactor. An over voltage event is extremely unlikely without an >alternator running. >It is pretty easy to reverse battery voltage when using jumper >cables. One has a 50-50 chance of getting it wrong. agreed. in fact, the spike suppression diode served to PROTECT against reversed polarity. It would have prevented contactor closing by shunting the applied voltage to near zero and thus causing the wire to melt. This suggests a reason for including a fuse in the battery contactor control line . . . it would prevent wire and fuse damage in the reverse polarity event. Perhaps a fusible link? 24AWG against a 20AWG control line? Perhaps a bit more robust mechanically. But this should be an exceedingly rare event. If you've not yet mailed the contactor, I suggest you re-install it and see what happens. Bob . . . Un impeachable logic: George Carlin asked, "If black boxes survive crashes, why don't they make the whole airplane out of that stuff?" ------------------------------------------------------------------------------------- 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.