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Reply To: | TechNet E-Mail Forum. |
Date: | Wed, 2 Aug 2000 13:44:30 EDT |
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In a message dated 08/02/2000 10:18:09 AM Central Daylight Time,
[log in to unmask] writes:
<< 'Netters:
This post is a follow on to Steve's recent post and responses about tinning
connectors.
I am very sensitive to the requirement about removal of gold from 95% etc
etc as stated in J-Std-001. So whenever we see something that appears Gold,
we double solder-dip the part.
However, what I'd like to know is.....
1) How common is this GXT(tm) finish? Do most "Gold leaded" devices have
this finish?
2) Are there any Class 3 builders out there that use parts with this finish
"as is"?
3) Does soldering the part "as is" result in normal looking solder joints?
4) Are qualified parts (e.g. Mil-C-55302) allowed to have this finish?
Thanks to all who can respond.
Bill Kasprzak
Moog Inc. >>
Hi Bill!
I looked over the spec, and it doesn't show anything but gold over
nickel...but I didn't go over ALL the specs amendments. They can be found at:
http://www.dscc.dla.mil/Programs/MilSpec/ListDocs.asp?BasicDoc=MIL-C-55302
The basic spec can be downloaded at:
http://www.dscc.dla.mil/Downloads/MilSpec/Docs/MIL-C-55302/mil55302.pdf
That's the one I looked over, it did say that you could have a connector that
had tin/ lead solder tails, but the plating must be at least 100-microinches
thick. It also went on to say that pre-tinning by dipping is acceptable as
long as it met some other spec (I forgot which one). Didn't see anything
about GXT though...
-Steve Gregory-
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