Paul, this is an old one I just ran across, some interesting stuff on resonant failures.
This would be a good subject for onboard PC's gathering data. How about some home brew transducers.. modified phono cartriges?
...Chrissi
What Chrissi? :-)>
Paul Lamar
DOH..oops! (couldn't for the life of me figure out "what's not to understand?")
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