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.
Overview of all experiments in which the product is used
![Microphone Box (115 V, 50/60 Hz), 1014521 [U8498283-115], Sound](/imagelibrary/U8498283-115/U8498283-115_01_Microphone-Box-115-V-5060-Hz.jpg)
![Microphone Box (115 V, 50/60 Hz), 1014521 [U8498283-115], Sound](/thumblibrary/U8498283-115/U8498283-115_01_1200_1200_Microphone-Box-115-V-5060-Hz.jpg)
![Microphone probe, long, 1017342 [U8498282], Sound](/thumblibrary/U8498282/U8498282_01_140_140_Microphone-probe-long.jpg)
![Microphone probe, short, 4008308 [U8498307], Sound](/thumblibrary/U8498307/U8498307_01_140_140_Microphone-probe-short.jpg)
![Experiment: Speed of sound in air (115 V, 50/60 Hz), 8000566 [UE1070310-115], Acoustics](/thumblibrary/UE1070310-115/UE1070310-115_01_140_140_Experiment-Speed-of-sound-in-air-115-V-5060-Hz.jpg)
![Experiment: Speed of sound in air (230 V, 50/60 Hz), 8000567 [UE1070310-230], Acoustics](/thumblibrary/UE1070310-230/UE1070310-230_01_140_140_Experiment-Speed-of-sound-in-air-230-V-5060-Hz.jpg)
![Experiment: Speed of sound in air (230 V, 50/60 Hz), 8000569 [UE1070320-230], Acoustics](/thumblibrary/UE1070320-230/UE1070320-230_01_140_140_Experiment-Speed-of-sound-in-air-230-V-5060-Hz.jpg)
![Kundt's Tube E, 1017339 [U8498308], Sound](/thumblibrary/U8498308/U8498308_01_140_140_Kundts-Tube-E.jpg)
![Experiment: Speed of sound in air (115 V, 50/60 Hz), 8000568 [UE1070320-115], Acoustics](/thumblibrary/UE1070320-115/UE1070320-115_01_140_140_Experiment-Speed-of-sound-in-air-115-V-5060-Hz.jpg)
![Diaphragm with 4 Double Slits of Different Spacings, 1000597 [U14101], Apertures, Diffraction Elements and Filters](/thumblibrary/U14101/U14101_01_140_140_Diaphragm-with-4-Double-Slits-of-Different-Spacings.jpg)
![Tube Holder D, 1008507 [U191001], Electron Tubes D](/thumblibrary/U191001/U191001_01_140_140_Tube-Holder-D.jpg)
![Electron Diffraction Tube D, 1013885 [U191711], Electron Tubes D](/thumblibrary/U191711/U191711_01_140_140_Electron-Diffraction-Tube-D.jpg)
![Set of 4 Gratings, 1003081 [U19515], Apertures, Diffraction Elements and Filters](/thumblibrary/U19515/U19515_01_140_140_Set-of-4-Gratings.jpg)
![Set of Slotted Weights, 10 x 10 g, 1003227 [U30031], Balance Weights](/thumblibrary/U30031/U30031_01_140_140_Set-of-Slotted-Weights-10-x-10-g.jpg)
![High Voltage Power Supply 5 kV (115 V, 50/60 Hz), 1003309 [U33010-115], Power Supplies](/thumblibrary/U33010-115/U33010-115_01_140_140_High-Voltage-Power-Supply-5-kV-115-V-5060-Hz.jpg)
![LDR 05 Photoresistor, 1012940 [U333048], Plug-In Component System](/thumblibrary/U333048/U333048_01_140_140_LDR-05-Photoresistor.jpg)
![Thermistor NTC, 1012941 [U333049], Plug-In Component System](/thumblibrary/U333049/U333049_01_140_140_Thermistor-NTC.jpg)
![Vibration Generator, 1000701 [U56001], Oscillations](/thumblibrary/U56001/U56001_01_140_140_Vibration-Generator.jpg)
![Resonance Wire, Ring Shaped, 1000707 [U56007], Mechanical Waves](/thumblibrary/U56007/U56007_01_140_140_Resonance-Wire-Ring-Shaped.jpg)
![Heating Rod K, 1017340 [U8498280], Sound](/thumblibrary/U8498280/U8498280_01_140_140_Heating-Rod-K.jpg)
![Pulse Box K, 1017341 [U8498281], Sound](/thumblibrary/U8498281/U8498281_01_140_140_Pulse-Box-K.jpg)
![Function Generator FG 100 (115 V, 50/60 Hz), 1009956 [U8533600-115], Function Generators](/thumblibrary/U8533600-115/U8533600-115_01_140_140_Function-Generator-FG-100-115-V-5060-Hz.jpg)