I have had crystal failure problem in our lines in past which finally
ended-up with crystal harmonics problem (wrong part mix-up from
supplier),.  I had to dig a hard before reaching on to the conclusion.
 You might want to get few of the parts tested for all their
specifications (specifically oscillations and harmonic disorder)
 before mounting on to the board.


-----Original Message-----
From:   Ken Patel [mailto:[log in to unmask]]
Sent:   Monday, May 11, 1998 4:25 PM
To:     [log in to unmask]
Subject:        [TN] Crystals/Oscillators failure

We are seeing more and more Crystal/Oscillators failures and it's
failure
analysis report done by manufacturer blames to handling. My questions
are ...

(1) Does any one has similar crystal failure attributed to improper
dropped shipment during transit/ mishandling on floor and how the
problem
was over come?

(2) Is there any reliability study done to evaluate g-force impact on
the
crystal? Are those kind of data available from crystal suppliers?
(well,
I am going to ask them but before that)

(3) I am getting crystal in tube and also in loose in bag. What is the
most
secure way of packaging and handling of crystals/oscillators?


I will really appreciate any help in getting to the bottom of the
problem.

re,
ken patel
______________________________________________________
Ken Patel                       Phone:  (408) 490-6804
1708 McCarthy Blvd.             Fax:    (408) 490-6859
Milpitas, CA 95035              Beeper: (888) 769-1808

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