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Connecting Shielded Cable to DB-25

 
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art(at)zemon.name
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PostPosted: Mon Sep 26, 2016 6:10 pm    Post subject: Connecting Shielded Cable to DB-25 Reply with quote
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
​

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

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ceengland7(at)gmail.com
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PostPosted: Mon Sep 26, 2016 6:35 pm    Post subject: Connecting Shielded Cable to DB-25 Reply with quote
On 9/26/2016 9:05 PM, Art Zemon wrote:

Quote:
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
​

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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cluros(at)gmail.com
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PostPosted: Tue Sep 27, 2016 12:21 am    Post subject: Connecting Shielded Cable to DB-25 Reply with quote
I would connect the shield to ground at the wing tip end Art, not at the wing root end.

Sebastien

On Sep 27, 2016, at 03:05, Art Zemon <art(at)zemon.name (art(at)zemon.name)> wrote:
Quote:
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
​

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







- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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cluros(at)gmail.com
Guest
PostPosted: Tue Sep 27, 2016 12:25 am    Post subject: Connecting Shielded Cable to DB-25 Reply with quote
Whoops, disregard last message, I see you are talking about the wire from the cabin. Any reason you can't just ground it at the switch?

Sebastien

On Sep 27, 2016, at 03:05, Art Zemon <art(at)zemon.name (art(at)zemon.name)> wrote:
Quote:
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
​

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







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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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art(at)zemon.name
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PostPosted: Tue Sep 27, 2016 4:12 am    Post subject: Connecting Shielded Cable to DB-25 Reply with quote
On Mon, Sep 26, 2016 at 9:32 PM, Charlie England <ceengland7(at)gmail.com (ceengland7(at)gmail.com)> wrote:
Quote:
On 9/26/2016 9:05 PM, Art Zemon wrote:

Quote:
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

- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
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