Products

Microphone Preamplifier

Model 426B03

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ICP® microphone preamplifier 1/4" to be used with prepolarized condenser microphone.

Nominal Microphone Diameter: 1/4"
Temperature Range: -40 to 176 °F (-40 to 80 °C)
Output Voltage: ±8 Vpk
Size - Length: 1.74 in (44.2 mm)

Specification Notes

[1] Typical.
[2] TEDS Capable Digital Memory and Communication, compliant with IEEE P1451.4
[3] Measured with an 18 pF reference microphone.
[4] Limited to 70°C if ICP current >10mA
[5] From -40 to 158°F (-40 to +70°C)
[1] Typical.
[6] See PCB Declaration of Conformance PS076 for details.

	English:	SI:
Performance
Nominal Microphone Diameter	1/4"	1/4"
Gain	-0.19 dB	-0.19 dB	[1] [3]
Frequency Response (±0.1 dB) (re 1 kHz)	5 to 126000 Hz	5 to 126000 Hz
Frequency Response (±0.2 dB) (re 1 kHz)	3.2 to 126000 Hz	3.2 to 126000 Hz
Frequency Response (-3 dB) (re 1 kHz)	<0.7 Hz	<0.7 Hz
Phase Linearity (<1 °)	63 to 20000 Hz	63 to 20000 Hz
Electrical Noise (A-weight)	<3.2 µV	<3.2 µV	[3]
Electrical Noise (A-weight)	1.9 µV	1.9 µV	[1] [3]
Electrical Noise (Flat 20 Hz to 20 kHz)	<5.6 µV	<5.6 µV	[3]
Electrical Noise (Flat 20 Hz to 20 kHz)	3.4 µV	3.4 µV	[1] [3]
Distortion (3 V rms input at 1 kHz)	<-70 dB	<-70 dB
Output Slew Rate	2 V/µS	2 V/µS	[1]
TEDS Compliant	Yes	Yes	[2]
Environmental
Temperature Range (Operating)	-40 to 176 °F	-40 to 80 °C	[4]
Temperature Range (Storage)	-40 to 185 °F	-40 to 85 °C
Temperature Response	<0.03 dB	<0.03 dB	[5]
Humidity Range (Non-Condensing)	0 to 95 %RH	0 to 95 %RH
Humidity Sensitivity	<0.03 dB	<0.03 dB
Electrical
Excitation Voltage	20 to 32 VDC	20 to 32 VDC
Constant Current Excitation	2 to 20 mA	2 to 20 mA
Impedance (Input)	20000000000 Ohm	20000000000 Ohm	[1]
Capacitance (Input)	0.15 pF	0.15 pF	[1]
Output Bias Voltage	10 to 14 VDC	10 to 14 VDC
Impedance (Output)	<50 Ohm	<50 Ohm
Output Voltage (Maximum)	±8 Vpk	±8 Vpk	[1]
Physical
Housing Material	Stainless Steel	Stainless Steel
Size - Diameter	0.25 in	6.4 mm
Size - Length	1.74 in	44.2 mm
Weight	0.21 oz	6 gm	[1]
Electrical Connector	10-32 Coaxial Jack	10-32 Coaxial Jack
Mounting Thread (Microphone to Preamplifier)	0.2244 - 60 UNS	5.7 mm - 60 UNS