I have a disgruntled customer with a 2 year old amplifier built into a
vibrating box (combo amp and speaker). It has 2 failed solder joints and
about 10 visibly and tug-test near to failure joints and perhaps 20 that
will fail in the next 5 years perhaps. Where is there a non technical
article on the WWW that explains the problems of unforgiving hard brittle
solder/ tin pest . I can find plenty of stuff on tin whiskers which really
only applies to fine geometry components , computers mainly.