Nor1204 ¼ inch preamplifier

Nor1204 ¼ inch preamplifier

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Part Number:Nor1204
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Nor1204 ¼ inch preamplifier

For applications requiring quarter-inch microphones this preamplifier will optimise the measurement configuration. The outside diameter of the preamplifier matches that of the Nor1244 and Nor1245 microphones in order that the assembly introduces the minimum disturbance to the field being investigated. Its electrical performance is closely equal to Nor1201.

The body of the preamplifier is made of stainless steel and fitted with an integral 2-metre lightweight cable. This is terminated with a standard LEMO seven pin connector compatible with the standard range of Norsonic extension cables.


Frequency range:      2Hz to 200kHz ±0.2dB
Input impedance:      20 Gohms, 0.2pF
Output impedance:      55 ohms @ 1kHz, CS: 20pF
Noise, A-weighted, CS 20pF:      3µV
Noise linear, CS 20pF:      <6µV
Gain, typical:      -0.15dB
Temperature, operation:      -40 to +60°C
Temperature, storage:      -40 to +85°C
Humidity, operation and storage:      0 to 95% RH
Current consumption (120V or ±60V):      2.5 mA
Current consumption (28V or ±15V):      0.7 mA
Dimensions: Length:      43 mm
Diameter:      6.35 mm
Weight:      6 g (not including the cable)
CE classification, EMC:      EN50081-1, EN50082-1
CE classification, safety:      EN61010-1, 1993 portable equipment pollution category 2

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