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David Clark M-7A Amplified Electret,09168P-33


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David Clark M-7A Amplified Electret,09168P-33
David Clark M-7A Amplified Electret,09168P-33
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Item #:09168P-33

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This Electret Microphone is a noise canceling type designed to operate in place of carbon and amplified dynamic microphones. It will not operate in circuits that do not supply a DC bias voltage. Most modern aviation communications equipment do supply this
  • DC Supply voltage and source resistance: 8 to 16 volts, ee0 to 2200 ohms-not polarity sensitive.
  • Output voltage, 1000 HZ for 114 dB SPL (re:.002 microbar) input, as a function of DC source resistance and AC input impedance.*Note-Electrical specifications are given for two earphones wired in parallel.

  • Frequency Response: designed for optimum speech intelligibility and noise cancellation.
  • Ambient noise level: Communications can be carried on in noise levels up to 120 dB SPL(re:.0002 microbar) with adequate signal to noise ratio. Microphone must be zero to 1/8" from lips at corner of mouth for best signal to noise ratio (maximum noise cancellation).
  • Dimensions: 3/4x4-1/64x1-27/32 (19x16x47mm).
  • Weight: 0.2 oz (5.6 grams)
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