
Bruel & Kjaer - 2607 Measuring Amplifier
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Bruel & Kjaer - 2607 Measuring Amplifier LF amplification 2-200,000 Hz, input 3 mV to 300 V switchable in 11 steps. Input for additional preamplifier (impedance converter / cathode follower) to use B + K condenser microphone capsules. Bandpass switchable 22.5 Hz ... 22.5 kHz. Switchable weighting filters A, B, C and D for sound level measurements....