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MV:220A Preamplifier

MV:220A Preamplifier
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MV:220A 1/2" Prepolarised Microphone Preamplifier Overview The MV:220A l/2-inch Preamplifier is a general purpose preamplifier suitable for use with prepolarised microphone capsules. It is a small unit with a slimline profile and is powered via the coxaial BNC-type connector. Power is from a suitable constant-current source of typically 4mA with a power supply excitation voltage of between 15v and 24v DC. The frequency response (-3dB points) of the MV:220A are 2.6Hz to 150kHz. Specifications Frequency Response -0.1dB at 16Hz and 20kHz -3dB at 2.6Hz and 150kHz Input Impedance >1200 MQ Output Impedance: 50 Ohms Gain -14.8dB (5.5x) with 18pF Microphone Capsule Noise Floor A-weighted: < 45dB Dimensions: Length: 98mm Power Supply The MV:220A can be used with the Cirrus Research Class+ Microphone Capsules including: • MK:224 Class 1 • MK:226 Class 1 • MK:216 Class 2 • MK:215 Class 2 • MK:4052H Class 2 High Level Constant Current Excitation: 4mA Output bias voltage: 10VDC Polarisation Voltage Non e Output Voltage Maximum output signal voltage: 1V RMS (2.82V Pk-Pk) Maximum signal input (with 40mV/Pa mic.capsule): 140dB Maximum Cable Length 100 meters Connection Input: 1/2" Microphone 60 UNS Startup stabilisation time 15 seconds Temperature Operation: -10oCto +50oC Storage: -20oC to +60oC dedicated to noise measurement Quality Environmental BRITISH SAFETY COUNCIL

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