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MICROPHONE: ELECT,M-55,
clearance
David Clark Co
Part # 09168P66=3D
The Model M-55 is an electret, noise-cancelling microphone suitable for replacing carbon and amplified dynamic microphones. It delivers clear voice transmission and requires a DC bias voltage to function, which is typically provided by modern aviation communication equipment. Users should consult technical manuals or avionics professionals if uncertain.
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