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cluros(at)gmail.com
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 Posted: Sat Oct 19, 2019 8:54 am Post subject: Soldering to a Solid Wire |
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I replaced my mechanical tach with a digital one last week and needed to connect some very small wires that came with the new tach to a couple resistors. Decided to solder rather than crimp because of how small the wires are. It was only halfway through that I realized I should have asked around to see if there is a proper way of doing this. I didn't find anything in the AEC or 43-13.
Is this good?
[img]cid:ii_k1xsuo601[/img]
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alec(at)alecmyers.com
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| Posted: Sat Oct 19, 2019 11:20 am Post subject: Soldering to a Solid Wire |
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If you’re looking for published standards, you could look at section 19 of this document:
https://standards.nasa.gov/standard/nasa/nasa-std-87394
Its title is "WORKMANSHIP STANDARD FOR CRIMPING, INTERCONNECTING CABLES, HARNESSES, AND WIRING"
On Oct 19, 2019, at 12:52 PM, Sebastien <cluros(at)gmail.com> wrote:
I replaced my mechanical tach with a digital one last week and needed to connect some very small wires that came with the new tach to a couple resistors. Decided to solder rather than crimp because of how small the wires are. It was only halfway through that I realized I should have asked around to see if there is a proper way of doing this. I didn't find anything in the AEC or 43-13.
Is this good?
<IMG_20191004_105557.jpg>
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ceengland7(at)gmail.com
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| Posted: Sat Oct 19, 2019 12:28 pm Post subject: Soldering to a Solid Wire |
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On 10/19/2019 11:52 AM, Sebastien wrote:
| Quote: | I replaced my mechanical tach with a digital one last week and needed to connect some very small wires that came with the new tach to a couple resistors. Decided to solder rather than crimp because of how small the wires are. It was only halfway through that I realized I should have asked around to see if there is a proper way of doing this. I didn't find anything in the AEC or 43-13.
Is this good?
[img]cid:part1.39CD69BF.9CFC9321(at)gmail.com[/img]
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The joints look fine. I'd only suggest that you can get by with a lot less bare wire. Multiple ways to do it; twisting like you did (but over maybe 1/4-1/2 inch), or by bending a couple of tiny 'fish hooks', linking them, and then crimping them slightly to stabilize them while you solder. Most texts make a big deal of making a strong mechanical joint and just using solder to make the electrical connection, but reality is that if you can keep the two wires stable while you solder, you can just have them touching and overlapping over a 1/4-3/8" length, the resulting joint would likely survive pulling the resistor apart, pulling on its other lead. Making a mechanically strong joint does more for creating a high quality soldering operation (especially for novice 'iron workers') than for joint strength.
Charlie
 Virus-free. www.avast.com [url=#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2] [/url]
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johnbright
Joined: 14 Dec 2011
Posts: 166
Location: Newport News, VA
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| Posted: Sat Oct 19, 2019 1:47 pm Post subject: Re: Soldering to a Solid Wire |
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Bob's Shop Notes: Soldered Lap Splicing of Wires
http://www.aeroelectric.com/articles/Solder_Lap_Splicing/Solder_Lap_Splices.html
Some Bob photos at http://www.aeroelectric.com/articles/In_Line_Resistor/
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art(at)zemon.name
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| Posted: Sat Oct 19, 2019 2:01 pm Post subject: Soldering to a Solid Wire |
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Sebastien,
That looks pretty darned sturdy to me! I think that the resistor will disintegrate long before the joint does.
I would have done something much shorter, adapting this technique: http://www.aeroelectric.com/articles/PM_Solder_Sleeve/PM_Solder_Sleeve.html
Cheers,
-- Art Z.
On Sat, Oct 19, 2019 at 12:39 PM Sebastien <cluros(at)gmail.com (cluros(at)gmail.com)> wrote:
| Quote: | I replaced my mechanical tach with a digital one last week and needed to connect some very small wires that came with the new tach to a couple resistors. Decided to solder rather than crimp because of how small the wires are. It was only halfway through that I realized I should have asked around to see if there is a proper way of doing this. I didn't find anything in the AEC or 43-13.
Is this good?
[img]cid:ii_k1xsuo601[/img]
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--
https://CheerfulCurmudgeon.com/Love the stranger for you yourselves were strangers in Egypt. Deut. 10:19
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jan_de_jong(at)casema.nl
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| Posted: Sat Oct 19, 2019 3:10 pm Post subject: Soldering to a Solid Wire |
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Soldering looks more than fine, but focus should be on mechanical robustness under vibration:
1. make the stiff section as short as possible
2. flexible multistrand wire on either side of this
3. cover with multiple layers of heat shrink.
See also: http://www.aeroelectric.com/articles/In_Line_Resistor/
On 19-10-2019 23:59, Art Zemon wrote:
| Quote: | Sebastien,
That looks pretty darned sturdy to me! I think that the resistor will disintegrate long before the joint does.
I would have done something much shorter, adapting this technique: http://www.aeroelectric.com/articles/PM_Solder_Sleeve/PM_Solder_Sleeve.html
Cheers,
-- Art Z.
On Sat, Oct 19, 2019 at 12:39 PM Sebastien <cluros(at)gmail.com (cluros(at)gmail.com)> wrote:
| Quote: | I replaced my mechanical tach with a digital one last week and needed to connect some very small wires that came with the new tach to a couple resistors. Decided to solder rather than crimp because of how small the wires are. It was only halfway through that I realized I should have asked around to see if there is a proper way of doing this. I didn't find anything in the AEC or 43-13.
Is this good?
[img]cid:part3.BDF591A4.6D2FA807(at)casema.nl[/img]
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--
https://CheerfulCurmudgeon.com/ Love the stranger for you yourselves were strangers in Egypt. Deut. 10:19
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cluros(at)gmail.com
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| Posted: Sat Oct 19, 2019 3:59 pm Post subject: Soldering to a Solid Wire |
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Thanks Art and Alec. I really like that pm solder sleeve idea, looks great and would have worked well here. I'll try it next time. After all, solder costs money.
On Sat, Oct 19, 2019 at 3:13 PM Art Zemon <art(at)zemon.name (art(at)zemon.name)> wrote:
| Quote: | Sebastien,
That looks pretty darned sturdy to me! I think that the resistor will disintegrate long before the joint does.
I would have done something much shorter, adapting this technique: http://www.aeroelectric.com/articles/PM_Solder_Sleeve/PM_Solder_Sleeve.html
Cheers,
-- Art Z.
On Sat, Oct 19, 2019 at 12:39 PM Sebastien <cluros(at)gmail.com (cluros(at)gmail.com)> wrote:
| Quote: | I replaced my mechanical tach with a digital one last week and needed to connect some very small wires that came with the new tach to a couple resistors. Decided to solder rather than crimp because of how small the wires are. It was only halfway through that I realized I should have asked around to see if there is a proper way of doing this. I didn't find anything in the AEC or 43-13.
Is this good?
[img]cid:ii_k1xsuo601[/img]
|
--
https://CheerfulCurmudgeon.com/Love the stranger for you yourselves were strangers in Egypt. Deut. 10:19
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nuckolls.bob(at)aeroelect
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| Posted: Sun Oct 20, 2019 5:43 am Post subject: Soldering to a Solid Wire |
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At 11:52 AM 10/19/2019, you wrote:
| Quote: | I replaced my mechanical tach with a digital one last week and needed to connect some very small wires that came with the new tach to a couple resistors. Decided to solder rather than crimp because of how small the wires are. It was only halfway through that I realized I should have asked around to see if there is a proper way of doing this. I didn't find anything in the AEC or 43-13.
Is this good? |
I would cover the resistors and their
exposed lead wires with heat shrink
before crimping the terminals on.
Bob . . .
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cluros(at)gmail.com
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| Posted: Sun Oct 20, 2019 6:01 am Post subject: Soldering to a Solid Wire |
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Well yes, but only if you think of it before crimping the terminal on  . Fortunately I have heatshrink that's just the right size to fit over those terminals. I wish I had used clear heatshrink though so I could see what it looked like once everything was bent and attached in position.
Sure is nice not having that clunky tach drive going from the engine to the panel anymore.
On Sun, Oct 20, 2019, 09:47 Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:
| Quote: | At 11:52 AM 10/19/2019, you wrote:
| Quote: | I replaced my mechanical tach with a digital one last week and needed to connect some very small wires that came with the new tach to a couple resistors. Decided to solder rather than crimp because of how small the wires are. It was only halfway through that I realized I should have asked around to see if there is a proper way of doing this. I didn't find anything in the AEC or 43-13.
Is this good? |
I would cover the resistors and their
exposed lead wires with heat shrink
before crimping the terminals on.
Bob . . .
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