3B30.30  BELL IN A VACUUM



  • Version 1
  • The signal from a transducer next to a signal source inside a vacuum chamber fades as the chamber is evacuated.
  • VGA output from the oscilloscope can be displayed on the big screen.
  • Wear face shield while chamber is evacuated.
        (inspect bell jar)
        (install filter, set pump on floor)
        (connect trigger output to scope, set trigger mode to Auto)
        (set trigger and Ch 1 coupling to AC)
        (set generator to resonant peak, amplitude full scale)


  • Version 2
  • An amplifier and speaker are used in place of the oscilloscope.
  • Wear face shield while chamber is evacuated.




         (inspect bell jar)
         (install filter, set pump on floor)
         (use phono input)

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