丹麦B&k前置放大器2669L-代理

This ½" Falcon Range microphone preamplifier operates over a wide range of temperature, humidity and other environmental conditions. Connector: lemo 0B 7 pin & lemo oB to lemo 1B

Uses

• Sound measurements with Brüel & Kjær 1/2" (1", 1/4" and 1/8" with adaptor) and compatible microphones
• General-purpose preamplifier and high-impedance input probe for Brüel & Kjær measuring instruments

Features

• Full electromagnetic compatibility (EMC)
• Detachable, thin cable for easy installation
• Compact LEMO connector at preamplifier
• Patented charge-injection calibration technique for on-site calibration of the whole measuring channel including the microphone
• Wide dynamic range
• Very low inherent noise, high input impedance
• Low output impedance and high output current allows use with long extension cables
• Wide working temperature range
• Falcon™ Range product with a three-year guarantee

  The preamplifier has a very high input impedance presenting virtually no load to the microphone. The high output voltage together with an extremely low inherent noise level gives a wide dynamic range.½" Microphone Preamplifier Te 2669 is a Falcon Range product for making precision acoustic measurements with Brüel & Kjær’s wide range of condenser microphones. You can connect ½" microphones directly and 1", ¼" and 1/8" tes using adaptors.

The preamplifier, cable and its connectors all fulfil EMC requirements.

You can verify the condition of the microphone, preamplifier and cable on-site using its patented charge injection calibration technique.

The preamplifier’s low output impedance allows the use of long extension cables without problems.

Diameter	1/2 Inch
Optimised	Acoustical
Connector at Preamplifier	LEMO 0B, 7-pin
Connector at Instrument/Cable	LEMO 1B, 7-pin
Calibration Facility	Charge Injection Calibration
Polarization Voltage Support	Yes
Supply Voltage	&plun; 14 to &plun; 60 V
Max Output Voltage	55 V
Max Output Current	20 mA
Frequency Range	3 to 200000 Hz
Attenuation	< 0.35 dB
Noise A-weighted, tical	1.9 µV
Noise 22 4 Hz to 300 kHz, tical	8.2 µV
Input Impedance	15||0.3 G Ω ||pF
TEDS UTID	1025 from serial number