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art(at)zemon.name
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 Posted: Mon Nov 28, 2016 6:06 pm Post subject: Wiring Harness Installed |
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Folks,
I've said it before but I need to say it again: Thank you for all of your advice and mentoring and generosity. Over the Thanksgiving weekend, I installed the first large piece of the wiring harness in my Bede BD-4C. There are lots of pictures (and probably way too many words) on my blog at Wiring Harness Installed.
Cheers,
  -- 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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nuckolls.bob(at)aeroelect
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| Posted: Mon Nov 28, 2016 6:50 pm Post subject: Wiring Harness Installed |
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At 08:04 PM 11/28/2016, you wrote:
| Quote: | Folks,
I've said it before but I need to say it again: Thank you for all of your advice and mentoring and generosity. Over the Thanksgiving weekend, I installed the first large piece of the wiring harness in my Bede BD-4C. There are lots of pictures (and probably way too many words) on my blog at Wiring Harness Installed.
|
Thank you for sharing this sir. One thought popped
up while reviewing the post . . . how LONG and what
SIZE are the pigtails on the paralleled d-sub pins?
You want the RESISTANCE of the pigtails to be significantly
larger than the resistance of each pin which is on
the order of 3 to 5 milliohms. I think we talked about
this some weeks back. As a rule of thumb, I try to put
12" of 22AWG wire in the 'ballasting' resitance
of each pin. This can be 6" pigtails on either side
of a connector interface . . . or 12" on one side
when the mating connector's wiring is not accessible
to you (like an etched circuit board connector).
12" of 22AWG is 16 milliohms give or take. When ever
I suggest this methodology for the misapplication of
d-subs, I strive to make this pigtail length and size
clear and perhaps even explain why. So while your
photos and narrative are excellent, I'll suggest you
add a notation that those 22AWG pigtails should be
on the order of 12" TOTAL.
Other than this niggling little detail, I'm impresses
with your work and willingness to pass along what
you've learned to others.
Bob . . .
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art(at)zemon.name
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| Posted: Mon Nov 28, 2016 7:39 pm Post subject: Wiring Harness Installed |
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Bob,
The pigtails are 12" total, 6" on each side of the connector, just as you specified. I will definitely update my blog post because this is an important point. IIRC, you had a write up about this on your website somewhere. Please point me at it so that I can include the pointer in my blog post.
Cheers,
  -- Art Z.
On Mon, Nov 28, 2016 at 8:49 PM, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:
| Quote: | At 08:04 PM 11/28/2016, you wrote:
| Quote: | Folks,
I've said it before but I need to say it again: Thank you for all of your advice and mentoring and generosity. Over the Thanksgiving weekend, I installed the first large piece of the wiring harness in my Bede BD-4C. There are lots of pictures (and probably way too many words) on my blog at Wiring Harness Installed.
|
 Thank you for sharing this sir. One thought popped
 up while reviewing the post . . . how LONG and what
 SIZE are the pigtails on the paralleled d-sub pins?
 You want the RESISTANCE of the pigtails to be significantly
 larger than the resistance of each pin which is on
 the order of 3 to 5 milliohms. I think we talked about
 this some weeks back. As a rule of thumb, I try to put
 12" of 22AWG wire in the 'ballasting' resitance
 of each pin. This can be 6" pigtails on either side
 of a connector interface . . . or 12" on one side
 when the mating connector's wiring is not accessible
 to you (like an etched circuit board connector).
 12" of 22AWG is 16 milliohms give or take. When ever
 I suggest this methodology for the misapplication of
 d-subs, I strive to make this pigtail length and size
 clear and perhaps even explain why. So while your
 photos and narrative are excellent, I'll suggest you
 add a notation that those 22AWG pigtails should be
 on the order of 12" TOTAL.
 Other than this niggling little detail, I'm impresses
 with your work and willingness to pass along what
 you've learned to others.
 Bob . . .
|
--
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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http://www.matronics.com/Navigator?AeroElectric-List |
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