At 09:01 AM 6/20/2003 -0400, Bob Ammerman wrote:

> >Not a stupid question at all.

Whew! :-)

> >What frequency?

40 KHz

> >Is the frequency variable?

It needs to vary one side to the other of that 40 KHz just for tweaking
purposes

> >How pure does the sine wave have to be?

Not necessarily pristine, but the cleaner the better, probably.  At least
to the point of diminishing returns.

John

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