AeroElectric-List Digest Archive

Mon 09/26/16


Total Messages Posted: 8



Today's Message Index:
----------------------
 
     1. 05:23 AM - solder splices (bob noffs)
     2. 08:20 AM - Re: solder splices (Roger)
     3. 12:03 PM - Re: Problems Soldering DB-25 Connectors (Efraim Otero)
     4. 12:22 PM - Re: Problems Soldering DB-25 Connectors (Sauli Aalto)
     5. 03:48 PM - Running Multiple Devices from One Serial Port Output (Ross Home)
     6. 04:28 PM - Re: Running Multiple Devices from One Serial Port Output (Rene)
     7. 07:10 PM - Connecting Shielded Cable to DB-25 (Art Zemon)
     8. 07:35 PM - Re: Connecting Shielded Cable to DB-25 (Charlie England)
 
 
 


Message 1


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    Time: 05:23:21 AM PST US
    From: bob noffs <icubob@gmail.com>
    Subject: solder splices
    hi all, 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? bob noffs


    Message 2


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    Time: 08:20:50 AM PST US
    From: Roger <rnjcurtis@charter.net>
    Subject: solder splices
    =C2-i know solder connections are generally frowned on, especially in eng ine compartment but my take on a solder splice in the middle of a 6'' run w ith 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 be lief is that a well executed solder connection, with good mechanical connec tion, good solder flow, and a double insulation with heat shrink, is in fac t more reliable than any other connection, over the long term. Just my hum ble opinion! Roger


    Message 3


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    Time: 12:03:19 PM PST US
    From: Efraim Otero <efraim.otero@gmail.com>
    Subject: Re: Problems Soldering DB-25 Connectors
    Thanks!! I got a lot to learn!! > On Sep 24, 2016, at 5:44 PM, Art Zemon <art@zemon.name> wrote: > > > > On Sat, Sep 24, 2016 at 2:46 PM, Art Zemon <art@zemon.name <mailto:art@zemon.name>> wrote: > On Fri, Sep 23, 2016 at 9:29 AM, Efraim Otero <efraim.otero@gmail.com <mailto:efraim.otero@gmail.com>> wrote: > Art: > Please send pictures so us newbies can compare thanks for sharing!! > > > Efraim, > > Your wish is my command :-) > > > One more photo. I disassembled and reassembled the first connector that I did (more than a week ago). I am much happier with this iteration: > > <IMG_20160924_164542.jpg> > > These wires are for the pitot tube heater. It draws 12 amps so I am using three pins each for power, plus one pin for the status lamp. These three 20 AWG pigtails join to 12 AWG wire which runs the length of the wing. > > Cheers, > -- Art Z. > > > > -- > http://CheerfulCurmudgeon.com/ <http://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


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    Time: 12:22:43 PM PST US
    From: Sauli Aalto <sauli.aalto@gmail.com>
    Subject: Re: Problems Soldering DB-25 Connectors
    I found a good old method here: https://www.youtube.com/watch?v=_GLeCt_u3U8 2016-09-22 2:33 GMT+02:00 Art Zemon <art@zemon.name>: > Folks, > > I am trying to solder 20 gauge wire into DB-25 connectors and having a > tough time. The conductors just barely fit into the cups on the backs of > the pins when everything is "dry," before tinning. After I tin either one, > pin or wire, I cannot get all of the conductors into the cup. I end up with > something like this: > > > I'm afraid that those are not acceptable. What do you think? > > If they are not acceptable, what is the solution? Can I trim a few > conductors away so that the remainder will slip into the cup? Or should I > just give up and switch to crimp pins? Or what? > > Thanks, > -- Art Z. > > -- > http://CheerfulCurmudgeon.com/ <http://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 5


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    Time: 03:48:36 PM PST US
    From: "Ross Home" <rossmickey@comcast.net>
    Subject: Running Multiple Devices from One Serial Port Output
    I am trying to hook my altitude encoder to my transponder and GPS. I have the TX and RX going to the right places but am wondering what I have to do with the grounds. Here are the connections. Serial Port 1 TX Encoder to Serial Port 1 RX Transponder Serial Port 1 GND Encoder to Serial Port 1 GND Transponder Serial Port 1 TX Encoder to Serial Port 2 RX GPS Serial Port 2 TX GPS to Serial Port 2 RX MX-20 Multifunctional Display Serial Port 2 GND GPS to Serial Port 2 GND MX-20 Multifunctional Display Will this work or do the different serial grounds screw things up? Ross Mickey RV-6A N9PT From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Roger Sent: Monday, September 26, 2016 8:18 AM Subject: RE: AeroElectric-List: solder splices 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 6


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    Time: 04:28:17 PM PST US
    From: "Rene" <rene@felker.com>
    Subject: Running Multiple Devices from One Serial Port Output
    I may be wrong, but do serial ports have a port ground? I have a GRT system and each serial port has an in and out..but no separate ground. In this case the serial out would be one wire going to wherever you want..to its serial in. Rene' 801-721-6080 From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ross Home Sent: Monday, September 26, 2016 4:45 PM Subject: AeroElectric-List: Running Multiple Devices from One Serial Port Output I am trying to hook my altitude encoder to my transponder and GPS. I have the TX and RX going to the right places but am wondering what I have to do with the grounds. Here are the connections. Serial Port 1 TX Encoder to Serial Port 1 RX Transponder Serial Port 1 GND Encoder to Serial Port 1 GND Transponder Serial Port 1 TX Encoder to Serial Port 2 RX GPS Serial Port 2 TX GPS to Serial Port 2 RX MX-20 Multifunctional Display Serial Port 2 GND GPS to Serial Port 2 GND MX-20 Multifunctional Display Will this work or do the different serial grounds screw things up? Ross Mickey RV-6A N9PT From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Roger Sent: Monday, September 26, 2016 8:18 AM Subject: RE: AeroElectric-List: solder splices 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 7


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    Time: 07:10:51 PM PST US
    From: Art Zemon <art@zemon.name>
    Subject: Connecting Shielded Cable to DB-25
    Folks, I need to connect a shielded cable to my DB-25 connector and I need some advice about how to physically construct this. Here is the wiring diagram =8B strobe position lights.pdf <https://drive.google.com/a/zemon.name/file/d/0BzOP2gb9_3RQdWlpOGM4STl3a0k/ view?usp=drive_web> =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 connected to a pin in the DB-25. The shield is to be connected to a local ground. This connector (when operating) will be inside the tubular spar of my Bede BD-4C, so the whole assembly will be well shielded; I'm not worried about how 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 center 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. Run the center conductor to the DB-25 and connect it to a pin just like any other 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 am I? And if not now, when?" Hillel*


    Message 8


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    Time: 07:35:17 PM PST US
    Subject: Re: Connecting Shielded Cable to DB-25
    From: Charlie England <ceengland7@gmail.com>
    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. Here is the wiring > diagram > > strobe position lights.pdf > <https://drive.google.com/a/zemon.name/file/d/0BzOP2gb9_3RQdWlpOGM4STl3a0k/view?usp=drive_web> > > 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 connected to a pin in the DB-25. The shield is to be > connected to a local ground. This connector (when operating) will be > inside the tubular spar of my Bede BD-4C, so the whole assembly will > be well shielded; I'm not worried about how 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 center 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. Run the center conductor to the DB-25 > and connect it to a pin just like any other 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 am I? And if not now, when?" Hillel/ Art, I believe Bob has a 'cookbook' page showing that technique for handling shields at sub-d connectors. You should be fine.




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