Jonathan,

Is this fracture occurring during wave solder?  In some of our applications
we put the thermistors in by hand after wave solder and use a high
temperature solder (10Sb90Pb).

Regards,

Phil Nutting
Manufacturing Engineer
Kaiser Systems, Inc.
High Voltage Power Supplies That Work(tm)
126 Sohier Road
Beverly, MA 01915
ph: 978-922-9300
fx: 978-922-8374
[log in to unmask]


-----Original Message-----
From: Jonathan Boyle [mailto:[log in to unmask]]
Sent: Friday, February 23, 2001 3:25 PM
To: [log in to unmask]
Subject: [TN] Fractured Joints!


Hello Technetters,

I have a problem with fractured joints on a thermistor. We only see this on
the thermistor.  I've got to clip off the lead and examine under a
magnifying glass to find it. Does anyone have some insight as to the
cause/solution? Maybe increase the preheat?

Thanks in advance!

Jonathan

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