Jack,
     
     This is not uncommon to run up against (seems to me it happens a lot 
     with SIMM's).  Generally, when this is a possibility, the connector 
     manufacturer has both solder coated and gold coated parts available.  
     We have not done any testing at Hitachi, but we do match similar 
     metals.  There's not much point in taking a chance since we've had no 
     problems changing to similar metals when it's not designed in to begin 
     with (we follow Bellcore requirements where dissimilar metals is 
     prohibited for use as contact mates).
     
     Regards,
     
     Roger Held
     Hitachi Computer Products (America), Inc.


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Subject: assy:compatability gold vs tin/lead
Author:  [log in to unmask] at Internet-HICAM-OK
Date:    5/22/96 10:31 AM


     
We have instances where tin/lead coated pins are inserted into gold plated 
sockets, etc.  Components even have gold/tin-lead or gold/tin interfaces, 
such as an IC socket with a gold contact with a tin sleeve.  Mil-Std-889B 
indicates gold as being incompatable with tin or tin/lead.  Has anyone 
looked into this issue and is there a potential for corrosion formation and 
associated problems?  Again, I just refereing to mechanical contact ( not 
soldering ).
     
Thanks,
Jack Tippit
Wilcox Electric
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