---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Thu 11/19/09: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:38 AM - Re: Re: Solid Wire for Ground (Robert L. Nuckolls, III) 2. 10:36 AM - Re: Solid Wire for Ground (messydeer) 3. 11:17 AM - Re: Re: Solid Wire for Ground (Robert L. Nuckolls, III) 4. 11:24 AM - Crowbar Circuit (Peter Mather) 5. 02:30 PM - [Fw: How Pumpkin Pies are made] (RScott) ________________________________ Message 1 _____________________________________ Time: 06:38:31 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Solid Wire for Ground At 11:20 AM 11/15/2009, you wrote: > >Thanks, guys :-) > >Sounds like I'll get some stranded wire for this. My panel ground is >located on the under side of the permanantly mounted glare shield. >It's a few inches away from the main buss block, whose piano hinge >sections can be seen in the pic. > >Regarding the panel ground buss, I have used a section of the B&C >forest of tabs. It would be convenient to rivet the brass block to >the glare shield and use one of the tabs to connect to the firewall. >Would using a faston for 10awg wire here be okay, or would it be >better to solder it, or both? I'd rather not have an ugly bolt head >on top of the glare shield. > >If I solder without the female faston, would I just drill a hole in >one of the tabs big enough for the bare wire to go through and >solder it like that? > >If soldering isn't as good as a ring to bolt connection, I'd prolly >make a little standoff bracket for the panel ground. The common point ground for stuff mounted on the instrument panel generally needs a LOT of places to attach ground wires. Further, these are seldom larger wires than 20AWG. This is why the D-Sub ground connector was proposed. http://aeroelectric.com/Pictures/Grounding/AVG_RA.jpg http://aeroelectric.com/Pictures/Grounding/Avionics_Bus_3.jpg This technique is much more compact than the forest-of-tabs product . . . and is best located on the panel - centrally located to the majority of devices requiring ground attachments. You can fabricate your own ground connector using techniques illustrated here http://aeroelectric.com/Pictures/Grounding/Minibus1.jpg http://aeroelectric.com/Pictures/Grounding/Minibus2.jpg This example was produced to offer a means by which lots of instrument lights could be connected to a single dimmer. Obviously, if used only as a single point ground, you don't need two-circuits on the connector. Solder TWO 12AWG grounds to the row of pins and terminate each 12AWG on it's own tab at the forest-of-tabs block on the firewall. Bob . . . ________________________________ Message 2 _____________________________________ Time: 10:36:50 AM PST US Subject: AeroElectric-List: Re: Solid Wire for Ground From: "messydeer" Thanks, Bob :-) I will only have 8 or 10 wires to ground in the panel. The section of tab forest for the panel ground has 20 tabs. I may need to get D-Sub tools, supplies, and skills for installing my not-yet-bought radio, but that's down the road a bit. Even if I had the stuff for it, it would only save me a little space, which surprisingly isn't much of an issue in this particular case. My ground blocks consist of one 48 tab ground block from B&C cut into three sections. 12 tabs are on the forward side of the firewall, 16 tabs on the rear side with a bolt and rivet connecting the two blocks. That leaves a 20 tab section available for the panel ground buss. There's actually no individual grounds going to the rear side of the firewall, just the single wire from the panel ground block. I can't think of anything in the future that I would add that I couldn't ground to the glare shield mounted panel ground buss. So could I eliminate the rear firewall block completely, and just connect the panel ground block wire to the big bolt through the firewall? Since I have 10awg to the main buss, I understand I need a 10awg ground. I would like to know how soldering this ground wire to a drilled out faston tab of the panel ground forest might work, or if it's better to use a #10 bolt and ring. -------- Dan Read this topic online here: http://forums.matronics.com/viewtopic.php?p=273743#273743 ________________________________ Message 3 _____________________________________ Time: 11:17:52 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Solid Wire for Ground > >Since I have 10awg to the main buss, I understand I need a 10awg >ground. I would like to know how soldering this ground wire to a >drilled out faston tab of the panel ground forest might work, or if >it's better to use a #10 bolt and ring. Ring terminal and bolt. Bob . . . --------------------------------------- ( It's MATRONICS FUND RAISER MONTH! ) ( Do your part to keep this marvelous ) ( tool sharp and available to all our ) ( brothers in the OBAM aviation ) ( community. ) --------------------------------------- ________________________________ Message 4 _____________________________________ Time: 11:24:00 AM PST US From: "Peter Mather" Subject: AeroElectric-List: Crowbar Circuit If anyone is interested I've posted a circuit and veroboard layout for a tested and working crowbar circuit based on the MC3423 chip on the blog for my Wittman Tailwind build. Total parts cost around $5. http://tailwindbuild.blogspot.com/2009/11/15th-november-2009-overvoltage-crowbar.html Click on the pics/diagrams to enlarge The variable resistor allows the crowbar voltage to be set as required and compensates for differences in the internal reference voltage on the MC3423. Best regards Peter ________________________________ Message 5 _____________________________________ Time: 02:30:10 PM PST US From: RScott Subject: AeroElectric-List: [Fwd: How Pumpkin Pies are made] ------------------------------------------------------------------------------------- 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.