Sondemikrofon forstærker/strømforsyning, 2-kanals, 3B

All-purpose dual-channel amplifier for long or short microphone probes. Particularly suitable for use with microsecond counters in experiments for determining speed of sound, including 12 V AC plug-in power supply. Both channels can be individually switched between the perating modes, “Signal” for connecting an oscilloscope, “Level” for connecting a voltmeters and “Pulse” for connecting a microsecond counter. The trigger threshold for the pulse depends on the gain of the pre-amp, which is adjustable.

Band width: 10 Hz to 42 kHz
Gain: 20 to 70x
Output impedance: 1 kΩ
Output signal: Switchable between Signal, Level and
Pulse
Signal: 0 – 14 Vpp
Level: 0 – 7 V DC
Pulse: Low: 0 V, high: 8 V DC, length: 150 ms
Inputs: 3.5 mm jack plugs
Outputs: BNC socket
Power supply: Via 12 V AC, 500 mA plug-in power supply
Dimensions: 100 x 75 x 35 mm
Weight, including power supply: 450 g approx.