Model : 426B31 | Microphone Preamplifier

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1/4" preamplifier with 7-pin LEMO conn. (for externally polarized microphones)

  • Nominal Microphone Diameter: 1/4"
  • Temperature Range: -4 to 167 °F (-20 to 75 °C)
  • Output Voltage: ±50 V
  • Size - Length: 4 in (101.6 mm)

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English: SI:
Performance
Nominal Microphone Diameter 1/4" 1/4"
Gain (1 ) -0.14 dB -0.14 dB [1] [2]
Frequency Response (±0.5 dB) 3.98 to 126000 Hz 3.98 to 126000 Hz [2]
Frequency Response (±0.3 dB) 5.01 to 126000 Hz 5.01 to 126000 Hz [2]
Frequency Response (±0.2 dB) 6.31 to 126000 Hz 6.31 to 126000 Hz [2]
Frequency Response (±0.1 dB) 10.0 to 126000 Hz 10.0 to 126000 Hz [2]
Phase Linearity (±1 °) 79.42 to 25000 Hz 79.42 to 25000 Hz [2]
Electrical Noise (A-weight) 3.8 µV 3.8 µV [1] [2]
Electrical Noise (A-weight) ≤4.8 µV ≤4.8 µV [2]
Electrical Noise (Flat 20 Hz to 20 kHz) 9.3 µV 9.3 µV [1] [2]
Electrical Noise (Flat 20 Hz to 20 kHz) ≤12.0 µV ≤12.0 µV [2]
Distortion (25 V rms input at 1 kHz) <-80 dB <-80 dB
Output Slew Rate 8 V/µS 8 V/µS [1]
TEDS Compliant Yes Yes
Environmental
Temperature Range (Operating) -4 to 167 °F -20 to 75 °C [3]
Temperature Range (Storage) -40 to 185 °F -40 to 85 °C
Humidity Range (Non-Condensing) 0 to 95 %RH 0 to 95 %RH
Electrical
Excitation Voltage (Single Supply) 28 to 120 V 28 to 120 V
Excitation Voltage (Dual Supply) ±14 to 60 V ±14 to 60 V
Current Draw 3.3 mA 3.3 mA [1]
Impedance (Input) 19.1 GOhm 19.1 GOhm [1]
Capacitance (Input) 0.18 pF 0.18 pF [1]
Output Bias Voltage (Dual Supply) 1.2 VDC 1.2 VDC [1]
Impedance (Output) <40 Ohm <40 Ohm
Output Voltage (Maximum) ±50 V ±50 V
Output Current (Maximum) 20 mA 20 mA [1]
Physical
Housing Material Stainless Steel Stainless Steel
Size - Diameter 0.25 in 6.35 mm
Size - Length 4 in 101.6 mm
Electrical Connector Integral Cable Integral Cable
Electrical Connector 7-pin LEMO FGG.1B.307 7-pin LEMO FGG.1B.307
Cable Length 10 ft 3 m
Mounting Thread (Microphone to Preamplifier) 0.2244 - 60 UNS 5.7 mm - 60 UNS
* All specifications are at room temperature unless otherwise specified
.


Specification Notes


[1] Typical.
[2] Measured with an equivalent microphone of 6.8 pF
[3] With Power Supply < ±18 VDC
[1] Typical.


Accessories


Supplied
ERC-16 Calibration of ICP® microphone preamplifier 1


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