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 (230 V, 50/60 Hz), 1014520 [U8498283-230], Sound](/imagelibrary/U8498283-230/U8498283-230_01_Microphone-Box-230-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 (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)
![Set of 15 Safety Experiment Leads, 75 cm, 1002843 [U138021], Circuits](/thumblibrary/U138021/U138021_01_140_140_Set-of-15-Safety-Experiment-Leads-75-cm.jpg)
![DC Power Supply 20 V, 5 A (230 V, 50/60 Hz), 1003312 [U33020-230], Power Supplies](/thumblibrary/U33020-230/U33020-230_01_140_140_DC-Power-Supply-20-V-5-A-230-V-5060-Hz.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)
![Barrel Foot, 1 kg, 1002834 [U13265], Bases](/thumblibrary/U13265/U13265_01_140_140_Barrel-Foot-1-kg.jpg)
![K-Type NiCr-Ni Immersion Sensor, -65°C – 550°C, 1002804 [U11854], Thermometers](/thumblibrary/U11854/U11854_01_140_140_K-Type-NiCr-Ni-Immersion-Sensor-65-C-550-C.jpg)
![Pair of Safety Experiment Leads, 75 cm, blue, red, 1017718 [U13816], Experiment Leads and Cables](/thumblibrary/U13816/U13816_01_140_140_Pair-of-Safety-Experiment-Leads-75-cm-blue-red.jpg)
![Pair of Safety Experiment Leads, 75 cm, 1002849 [U13812], Experiment Leads and Cables](/thumblibrary/U13812/U13812_01_140_140_Pair-of-Safety-Experiment-Leads-75-cm.jpg)
![Microsecond Counter (230 V, 50/60 Hz), 1017333 [U8498285-230], Digital Counters](/thumblibrary/U8498285-230/U8498285-230_01_140_140_Microsecond-Counter-230-V-5060-Hz.jpg)
![Digital Counter (230 V, 50/60 Hz), 1001033 [U8533341-230], Measurement of Time](/thumblibrary/U8533341-230/U8533341-230_01_140_140_Digital-Counter-230-V-5060-Hz.jpg)
![Function Generator FG 100 (230 V, 50/60 Hz), 1009957 [U8533600-230], Function Generators](/thumblibrary/U8533600-230/U8533600-230_01_140_140_Function-Generator-FG-100-230-V-5060-Hz.jpg)
![HF Patch Cord, BNC/4 mm Plug, 1002748 [U11257], Experiment Leads and Cables](/thumblibrary/U11257/U11257_01_140_140_HF-Patch-Cord-BNC4-mm-Plug.jpg)
![Universal Clamp, 1002830 [U13255], Clamps](/thumblibrary/U13255/U13255_01_140_140_Universal-Clamp.jpg)
![HF Patch Cord, BNC/4 mm Plug, 4008293 [U8557626], Experiment Leads and Cables](/thumblibrary/U8557626/U8557626_01_140_140_HF-Patch-Cord-BNC4-mm-Plug.jpg)
![Tripod Stand 150 mm, 1002835 [U13270], Bases](/thumblibrary/U13270/U13270_01_140_140_Tripod-Stand-150-mm.jpg)
![Pocket Measuring Tape, 2 m, 1002603 [U10073], Measurement of Length](/thumblibrary/U10073/U10073_01_140_140_Pocket-Measuring-Tape-2-m.jpg)
![Analogue Multimeter ESCOLA 100, 1013527 [U8557380], Hand-held Analog Measuring Instruments](/thumblibrary/U8557380/U8557380_01_140_140_Analogue-Multimeter-ESCOLA-100.jpg)