[time-nuts] HP 5370B low frequency modulation
Richard (Rick) Karlquist
richard at karlquist.com
Thu Aug 30 11:21:37 EDT 2007
Gold mixes with solder to from an "intermetallic" that
suffers from "embrittlement". I am not aware of silver
solder being a remedy. I have heard of assembly lines
that do not allow any gold whatsoever in the building!
I heard our assembly line manager at work just
last week lecturing yet another engineer about NO GOLD.
Furthermore, gold plated brass connectors screwed into
aluminum (with corrosion treatment) (no soldering) will
corrode in a salt spray environment. I guarantee it.
We always used stainless for military work.
Brooke Clarke wrote:
> Hi Didier:
> Would you elaborate on the comment "Gold plated connectors are a well
> known example." Do you mean when soldered with Lead Tin solder instead
> of a silver bearing solder or something else?
> Have Fun,
> Brooke Clarke
> Didier Juges wrote:
>> ); SAEximRunCond expanded to false
>> time-nuts-bounces+brooke=pacific.net+brooke=pacific.net at febo.com
>> I have seen cold solder joints on thermal fuses and certain types of
>> capacitors, while the rest of the instrument was fine with no sign of
>> I think it has to do with the metal used for certain component leads.
>> they were never soldered well, or interface corrosion developed over
>> Gold plated connectors are a well known example.
>> Didier KO4BB
>> -----Original Message-----
>> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
>> Behalf Of Mike Feher
>> Sent: Sunday, July 22, 2007 9:58 PM
>> To: 'Discussion of precise time and frequency measurement'
>> Subject: Re: [time-nuts] HP 5370B low frequency modulation
>> Highly unlikely, but, possible, especially if it was in a corrosive
>> atmosphere. Of course then I would expect to see evidence of corrosion on
>> other components. ...
>> Mike B. Feher, N4FS
>> 89 Arnold Blvd.
>> Howell, NJ, 07731
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