#local_oscillator__localoscillator__heterodyne_oscillator  an oscillator whose output heterodynes with the incoming radio signal to produce sum and difference tones
  supertype:  #oscillator  generator that produces sonic oscillations or alternating current
  part of:  #heterodyne_receiver__superheterodyne_receiver__superheterodynereceiver__superhet  a radio receiver that combines a locally generated frequency with the carrier frequency to produce a supersonic signal that is demodulated and amplified

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