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January 1999

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Fri, 8 Jan 1999 14:06:22 -0600
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Gaby,

Sorry about your troubles. I've never run into it with through hole devices, but many times with SMT
types having been reflowed and often needing touched-up because of poor solder termination
solderability.

It sounds and looks (in x-section) like a smilar problem. The fine coil wires become detached under
thermal stress because of dissimilar expansion rates at the attachment "legs."

We solved some, not all, problems by changing a supplier once to improve solderability. In another
instance, we more carefully watched our profiles to do everything possible to avoid touch-up.

Good luck,

Earl Moon

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