Hi All,
I'd like how to know how to make a cheap, efficent, but
powerful (high pressure, capable of compressing gases) Ultrasonic waves?
I saw the standard quartz crystal oscillators but they seem
VERY weak.  The ultrasonic cleaners don't seem very powerful
either.  I need this for a school project so I'd prefer to
build it myself (make modifications, etc.).  Does anyone know where I
can get information on building one of these or, if that is
not possible, where I can buy a unit that isn't too expensive.
Please e-mail all responses to me because my Usenet server is
down (sending this through a mail to news service).  Thanks in
advance.
Henry