Microphones/Preamplifiers

Nor1203

½″ insert voltage preamplifier

The Nor1203 ½″ insert voltage preamplifier is designed specifically for calibration tasks using the insert voltage technique.

This method is applied to determine the open-circuit voltage of a microphone cartridge with high precision.

The preamplifier is supplied with an integral LEMO‑style connector for reliable, repeatable laboratory use.

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Specifications

Frequency range: 2 Hz to 200 kHz ±0.2 dB
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: -0.15 dB
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: 77.5 mm
Diameter: 12.7 mm
Weight: 33 g

CE classification, EMC: EN 50081-1, EN 50082-1
CE classification, safety: EN 61010-1, 1993 portable equipment pollution category 2

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Nor1203

½″ insert voltage preamplifier

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Applications

What are you going to measure?