D-Sub question

[sonny junell]

Why should i used the pin / socket insertion style d-sub's (solder "or crimp" then insert pin in to the sub frame) vs the solder pot style where my only step is solder and be done?

Thanks for any input.

[Walt]

The machined stlye pins/sockets are the best, crimp and install, no solder required. They are more reliable, easier to work with and of course... a little more expensive

[flion]

Easy replacement if a pin fails or breaks, easy addition of new pins if you haven't filled them all, easier to attach wires and then insert into connector as opposed to trying to solder in close proximity to other pins. Those are my top 3.

[pczar3]

We use the crimp style at work because the solder can wick up into the wire making it more brittle at the pin. This is not a problem if you have a good strain relief but if the strain relief is loose you can stress the wire to the breaking point. In the old days the Air Force did not allow soldered pins for this reason
Hope this helps,

Paul
YMMV

[az_gila]

Originally Posted by pczar3

We use the crimp style at work because the solder can wick up into the wire making it more brittle at the pin. This is not a problem if you have a good strain relief but if the strain relief is loose you can stress the wire to the breaking point. In the old days the Air Force did not allow soldered pins for this reason
Hope this helps,

Paul
YMMV

...does allow soldered joints if done to specification.

Check 6.14 here - http://workmanship.nasa.gov/lib/insp.../frameset.html

Soldering is OK if the wires are supported correctly in the shell strain relief. However, the dimensions are small in the solder cups and you might actually find the crimping easier.

Lots of electronics has historically been soldered and has worked fine under all sorts of vibration and stress, including all of the early stuff on the moon and Mars - my first US job in the early 70's....

PS - the Air Force also used lots of Hughes Aircraft missiles, satellites and radars with lots of soldered joints in them...

[vlittle]

... and when you are upside down underneath your panel, it's hard to hold a soldering iron in your teeth, solder in one hand and the wire in your second hand.

The solder splash burns take a while to heal.

Vern

[David_Nelson]

Originally Posted by vlittle

... and when you are upside down underneath your panel, it's hard to hold a soldering iron in your teeth, solder in one hand and the wire in your second hand.

The solder splash burns take a while to heal.

Vern

LOL - Never tried holding the iron in my teeth! And of course holding the connector (or whatever it is you are soldering to), in your third hand.

[sonny junell]

Originally Posted by vlittle

... and when you are upside down underneath your panel, it's hard to hold a soldering iron in your teeth, solder in one hand and the wire in your second hand.

The solder splash burns take a while to heal.

Vern

HAHAH Yeah , that would definitely happen to me,


OK I am sold on the crimp pin / socket style thanks for the feedback

[az_gila]

Originally Posted by sonny junell

HAHAH Yeah , that would definitely happen to me,


OK I am sold on the crimp pin / socket style thanks for the feedback

..of the NASA link will give some good pictorial references of what a good crimp should look like - practice on a few first.

http://workmanship.nasa.gov/lib/insp.../frameset.html

[sonny junell]

Originally Posted by az_gila

..of the NASA link will give some good pictorial references of what a good crimp should look like - practice on a few first.

http://workmanship.nasa.gov/lib/insp.../frameset.html

That is a great site< THANKS