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April 1998

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Subject:
From:
Michael Weiner <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 1 Apr 1998 15:36:17 +0300
Content-Type:
text/plain
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text/plain (48 lines)
Dwight,
 May I join in on this issue with another aspect.
 We assemble back planes and daughter boards with press fit type
connectors for
 years now with very good results.
 As you have  mentioned, we too consult the bible (GR-78-CORE).
  We always specify solder finish for the connector  tails for use in
our pwb's,
  which are hasl finished.
  Mating section is gold on both male and female.
  Recently, a distinguished (no names ) connectors manufacturer has
announced that
  a particular part no. is available with  gold finish only. Promising
us that even though
  there is potential difference between gold and tin (lead):
  "this will not result in a galvanic corrosion"
  The Bellcore does not address this issue of galvanic intermetal
compatibility
  with regard to press -fit .
   Is there  any test data to prove that galvanic couples do not pose
any problem in
  press fit application for telecom environment.
  BTW the potential difference between gold and solder according to
mil-f-14072
  is 0.65 volt.
  Any help will be appreciated.

  Mickey
--
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         michael weiner    Tadiran Telecommunications Ltd
           tel: 972-3-9262937      fax: 972-3-9261803
              e-mail: [log in to unmask]
            homepage  http://www.tadirantele.com/
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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