Area Microphone Preamplifier

Product Description

The Model 265 Area Microphone Preamplifier is designed to detect and amplify acoustic cockpit signals for routing to cockpit voice records. The model 265-002 is designed to include an internally mounting microphone for receiving acoustic input signals at the microphone opening located at the front of the enclosure. 

Specifications

• Amplifier Gain:
  16 dB to 36 dB (adjustable)
• Output Levels:
  1.0 VRMS into 600Ω when acoustic input level is 94 dB SPL above 20 µPascals
• Amplifier Frequency Responce:
  Flat within 3 dB from 100 Hz to 10,000 Hz
• Acoustic Frequency Response:
  Flat within 3 dB from 150 Hz to 8,000 Hz
• Amplifier Distortion:
  Less than 1% THD+N
• Acoustic Distortion:
  Less than 5% THD+N
• Microphone Output:
  1.0 VRMS into 600Ω (nominal) 2.0 VRMS into 600Ω (max.)
• Power Supply:
  28 VDC @ 30 mA
• Temperature
  : -55°C to 70°C
• Altitude:
  Up to 55,000 ft
• Qualifications:
  FAR Part 21, TSO C139, TSO C123b, Eurocae ED112, RTCA DO-214 & RTCA DO-160E

Product Codes

• Mfr Part No
  265-002
• ECCN
  9A610.Y.18
• NSN
  5996-01-685-3144
• TSO
  C50c