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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
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See:
http://journals.cambridge.org/download.php?file=%2FMAM%2FMAM11_S02%2FS1431927605504483a.pdfcode=7eb044ef7101eff8a8274c4fdfabca59
and
http://www.tkb-4u.com/articles/soldering/sgons/sgons.php
There is also at least one
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-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Richard
(Rick) Karlquist
Sent: Thursday, August 30, 2007 10:22 AM
To: Discussion of precise time and frequency measurement
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From: Didier Juges [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Date: Thu, 30 Aug 2007 18:10:56 -0500
Message-ID: [EMAIL PROTECTED]
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When you solder a connector pin that is gold plated, the concentration of
gold in the immediate vicinity of the interface is maximum, since you go
from pure gold to pure tin/lead and you have all the gradient in-between
because
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This is an interesting discussion about gold. Thanks to all
those who have posted. My question is -- I've noticed that
almost all my old HP instruments, from the 60's and some
decades thereafter, use a large amount of gold on
My experience is that thermal cycling and vibration exacerbate the problem
very greatly. We have been making both commercial and military products for
a long time, and we started seeing the problem in military products much
before we ever saw it in commercial products.
The intermetallic compound
