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PostPosted: Mon Nov 09, 2015 9:20 pm 

Joined: Mon Nov 09, 2015 1:15 am
Posts: 6
Im a mechanic and run by these little boards all day long. I just dont know what they would be classified as.

These are from vehicle door lock remotes and some cruise control switches. It looks like theres a decent amount of gold plating, but im not experienced at all, what grade would these classify under? Thank you


Attachments:
File comment: Very small board
20151109_195959.jpg
20151109_195959.jpg [ 2.32 MiB | Viewed 1228 times ]
File comment: Xm radio plugin board
20151109_200021.jpg
20151109_200021.jpg [ 1.81 MiB | Viewed 1228 times ]
File comment: Digital car clock board
20151109_195918.jpg
20151109_195918.jpg [ 2.15 MiB | Viewed 1228 times ]
File comment: Back of cruise control switch
20151109_195844.jpg
20151109_195844.jpg [ 1.76 MiB | Viewed 1228 times ]
File comment: Cruise control switch
20151109_195945.jpg
20151109_195945.jpg [ 1.69 MiB | Viewed 1228 times ]
File comment: Door lock key remotes
20151109_195815.jpg
20151109_195815.jpg [ 2.29 MiB | Viewed 1228 times ]
File comment: Cruise control switch
20151109_195834.jpg
20151109_195834.jpg [ 2.09 MiB | Viewed 1228 times ]
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PostPosted: Tue Nov 10, 2015 12:02 pm 
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Joined: Fri Feb 14, 2014 10:57 pm
Posts: 95
My guess is that you can toss them all into the Peripheral category, but I would wait on confirmation from one of the pros.


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PostPosted: Tue Nov 10, 2015 12:45 pm 

Joined: Tue Feb 03, 2015 6:57 pm
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Location: Low DOS
Everything looks to be peripheral grade.


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PostPosted: Tue Nov 10, 2015 12:58 pm 

Joined: Mon Nov 09, 2015 1:15 am
Posts: 6
Thats what i was assuming too, thanks everyone


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PostPosted: Tue Nov 10, 2015 1:08 pm 

Joined: Tue Feb 03, 2015 6:57 pm
Posts: 3578
Location: Low DOS
The gold looks nice and shiny but is actually extremely thin. A few microns. what your actually Seeing is the reflection from the nickel-tin-copper base underneath the gold which is highly polished.
Heavy plating like military &industrial boards and old stuff from pre-90s computers is dull and grimy looking.


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PostPosted: Tue Nov 10, 2015 2:28 pm 
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Joined: Fri Feb 14, 2014 10:57 pm
Posts: 95
Yeup, absolutely, what lostinlodos says. Typical Au thickness went from 80-100 micro inches in the pre 90s (even thicker in some older applications), to less than ten micro inches today. A trained eye will recognize that dull, yellow look as old, thick gold.


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