---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Tue 09/27/16: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:21 AM - Re: Connecting Shielded Cable to DB-25 (Sebastien) 2. 01:25 AM - Re: Connecting Shielded Cable to DB-25 (Sebastien) 3. 05:12 AM - Re: Connecting Shielded Cable to DB-25 (Art Zemon) 4. 05:13 AM - Re: solder splices (bob noffs) 5. 05:40 AM - Re: solder splices (Robert L. Nuckolls, III) 6. 04:58 PM - Re: solder splices (bob noffs) ________________________________ Message 1 _____________________________________ Time: 01:21:47 AM PST US From: Sebastien Subject: Re: AeroElectric-List: Connecting Shielded Cable to DB-25 I would connect the shield to ground at the wing tip end Art, not at the win g root end. Sebastien > On Sep 27, 2016, at 03:05, Art Zemon wrote: > > Folks, > > I need to connect a shielded cable to my DB-25 connector and I need some a dvice about how to physically construct this. Here is the wiring diagram > =8B > strobe position lights.pdf > =8B > I am concerned with the construction of wires LIGHTS-1-C and LIGHTS-1-D at the wing root. Specifically, the center conductor of the cable is to be con nected to a pin in the DB-25. The shield is to be connected to a local groun d. This connector (when operating) will be inside the tubular spar of my Bed e BD-4C, so the whole assembly will be well shielded; I'm not worried about h ow many unshielded inches I have near the DB-25. > > This is what I think will work: Strip the outer insulation of the shielded cable back several inches, so that I can separate the shield from the cente r conductor outside the DB-25 housing. Solder a sufficient amount of wire to the shield so that I can work with it and attach it to the local ground. Ru n the center conductor to the DB-25 and connect it to a pin just like any ot her wire. > > Your thoughts? > > Thank you, > -- Art Z. > > -- > https://CheerfulCurmudgeon.com/ > > "If I am not for myself, who is for me? And if I am only for myself, what a m I? And if not now, when?" Hillel ________________________________ Message 2 _____________________________________ Time: 01:25:40 AM PST US From: Sebastien Subject: Re: AeroElectric-List: Connecting Shielded Cable to DB-25 Whoops, disregard last message, I see you are talking about the wire from th e cabin. Any reason you can't just ground it at the switch? Sebastien > On Sep 27, 2016, at 03:05, Art Zemon wrote: > > Folks, > > I need to connect a shielded cable to my DB-25 connector and I need some a dvice about how to physically construct this. Here is the wiring diagram > =8B > strobe position lights.pdf > =8B > I am concerned with the construction of wires LIGHTS-1-C and LIGHTS-1-D at the wing root. Specifically, the center conductor of the cable is to be con nected to a pin in the DB-25. The shield is to be connected to a local groun d. This connector (when operating) will be inside the tubular spar of my Bed e BD-4C, so the whole assembly will be well shielded; I'm not worried about h ow many unshielded inches I have near the DB-25. > > This is what I think will work: Strip the outer insulation of the shielded cable back several inches, so that I can separate the shield from the cente r conductor outside the DB-25 housing. Solder a sufficient amount of wire to the shield so that I can work with it and attach it to the local ground. Ru n the center conductor to the DB-25 and connect it to a pin just like any ot her wire. > > Your thoughts? > > Thank you, > -- Art Z. > > -- > https://CheerfulCurmudgeon.com/ > > "If I am not for myself, who is for me? And if I am only for myself, what a m I? And if not now, when?" Hillel ________________________________ Message 3 _____________________________________ Time: 05:12:15 AM PST US From: Art Zemon Subject: Re: AeroElectric-List: Connecting Shielded Cable to DB-25 On Mon, Sep 26, 2016 at 9:32 PM, Charlie England wrote: > On 9/26/2016 9:05 PM, Art Zemon wrote: > > Folks, > > I need to connect a shielded cable to my DB-25 connector and I need some > advice about how to physically construct this.... > > Art, > > I believe Bob has a 'cookbook' page showing that technique for handling > shields at sub-d connectors. You should be fine. > I found it: Shield Termination Techniques I can adapt that nicely. Thank you, Charlie. -- Art Z. -- https://CheerfulCurmudgeon.com/ *"If I am not for myself, who is for me? And if I am only for myself, what am I? And if not now, when?" Hillel* ________________________________ Message 4 _____________________________________ Time: 05:13:50 AM PST US From: bob noffs Subject: Re: AeroElectric-List: solder splices i agree that the joint if undisturbed can't be beat. i was questioning if movement would become a factor in the condition i described. bob noffs On Mon, Sep 26, 2016 at 10:17 AM, Roger wrote: > > > i know solder connections are generally frowned on, especially in engine > compartment but my take on a solder splice in the middle of a 6'' run with > the wire bundled with 6 others is that it is totally satisfactory. am i > wrong that solder is ok if you pick your application sites? > > > *I was never aware that solder connections were frowned upon! In fact my > belief is that a well executed solder connection, with good mechanical > connection, good solder flow, and a double insulation with heat shrink, is > in fact more reliable than any other connection, over the long term. Just > my humble opinion!* > > > *Roger* > > ________________________________ Message 5 _____________________________________ Time: 05:40:11 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: solder splices At 07:07 AM 9/26/2016, you wrote: >hi all, >=C2 i know solder connections are generally >frowned on, especially in engine compartment but >my take on a solder splice in the middle of a >6'' run with the wire bundled with 6 others is >that it is totally satisfactory. am i wrong that >solder is ok if you pick your application sites? >=C2 bob noffs I don't know why it wouldn't be just fine ANYWHERE the materials, talents and tools are likely to produce a serviceable joining . . . irrespective of location. Soldering was 'frowned upon' on the 1960's production lines at Cessna because soldering irons burned people and melted carpets. At Boeing, I had to have a fireman come out and give me a permit to plug in an iron . . . just to make sure I wasn't working the task close to flammables. It's process sensitive (meaning you gotta have the moves). But an artfully crafted solder joint is no more/less risky to meeting design goals than a crimped connection. Bob . . . ________________________________ Message 6 _____________________________________ Time: 04:58:38 PM PST US From: bob noffs Subject: Re: AeroElectric-List: solder splices ok, away we go. i like my soldered joints more than any crimped joint cuz i made them. bob On Tue, Sep 27, 2016 at 7:36 AM, Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > At 07:07 AM 9/26/2016, you wrote: > > hi all, > =C3=82 i know solder connections are generally frowned on, especially in engine > compartment but my take on a solder splice in the middle of a 6'' run wit h > the wire bundled with 6 others is that it is totally satisfactory. am i > wrong that solder is ok if you pick your application sites? > =C3=82 bob noffs > > > I don't know why it wouldn't be just fine ANYWHERE > the materials, talents and tools are likely to > produce a serviceable joining . . . irrespective > of location. > > Soldering was 'frowned upon' on the 1960's > production lines at Cessna because soldering irons > burned people and melted carpets. At Boeing, I had > to have a fireman come out and give me a permit > to plug in an iron . . . just to make sure I wasn't > working the task close to flammables. It's process > sensitive (meaning you gotta have the moves). > But an artfully crafted solder joint is no > more/less risky to meeting design goals than > a crimped connection. > > > 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.