[time-nuts] HP 5370B low frequency modulation

Didier Juges didier at cox.net
Mon Jul 23 06:26:06 EDT 2007

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. Either
they were never soldered well, or interface corrosion developed over time.

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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