Telex ANRTM 150 Specifications, Receivers and Noise Reduction Circuits, Microphone and Amplifier

Specifications

Receivers and Noise Reduction Circuits:

Reciever Type: Dynamic

Frequency Response: 50 Hz - 1.5 kHz

Sensitivity (Max. Volume): 95 ± 5 dB SPL (1 kHz, 1 mW input per earcup side)

Impedance (Max. Volume): Stereo: 300 ohms per side, Monaural: 150 ohms

Stereo/Mono: Switch in cord allows Stereo or Monaural headset operation.

Noise Reduction Power Consumption: 50 mW nominal, 1.5W peak per side (dependent on noise level)

Microphone and Amplifier:

Element Type: Noise-canceling amplified electret

Frequency Response: 100 Hz - 5000 Hz

Sensitivity: -51 ±3 dB (ref:1 V/ µbar at 1 kHz with 12 Vdc 150 ohm AC load)

Matching Impedance: 50-600 ohms

Gain Adjustment Range: ± 5 dB (clockwise rotation increases gain)

Operating Voltage (supplied by aircraft radio): 8-16 Vdc

Microphone Interface: Operates from a typical aircraft radio per RTCA DO-170; 8 to 16 Volts DC with 470 ohm DC resistance, 150 ohm AC resistance

Power:

To turn Power on and off simply plug or unplug the battery or Aircraft Power Module.

Batteries: One 9V alkaline battery installed in the battery module.

ANR Battery Life: 40 hours minimum

Fail-Safe Mode:

If battery power is too low for normal ANR operation or if the power module is disconnected, the headset will perform like a standard headset maintaining communications with the aircraft radio.

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