Hi Ron:
                  Do not know of any studies made in socketed components
exposed to vibration. One solution to avoiding parts vibrate out would
be to lace cord the part to the socket. The lacing cord is routed twice
in a pig knot and knotted again to secure the cord.  There may be other
material that is made specially for the purpose of holding parts to the
sockets. I would ask the socket vendors. 
        Good luck,
        Ramon

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ron Fowler
Sent: Friday, January 27, 2006 2:46 PM
To: [log in to unmask]
Subject: [TN] Soldered J lead components vs socketed

Does anyone know of a specification, study, or other document that can
define "Best Practices" when it comes to soldering vs socketing  68 lead
MPU.  History tells me that socketed components that use sockets without
some form of mechanical lock down have a tendency to back out during
vibration and/or mechanical shock.  Particular condition is a portable
unit that gets handled pretty rough.


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