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Signal Processing Systems : Audio Transformers : Jensen Transformers, Inc. - JT-MB-CA

Jensen Transformers, Inc. - JT-MB-CA

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Microphone Input Transformer with 0.045% Distortion Ratio

Model: JT-MB-CA

Ideal retrofit to solve problems with transformerless preamps
Dual Faraday shields provides very high CMRR 122dB at 60Hz
Eliminates complex circuitry required to block phantom power
Excellent frequency response and time domain performance

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JT-MB-CA transformer is designed to couple a nominal 150ohms mic to the 3kohms input impedance typical of transformerless preamps. Both windings are fully balanced and either may be reversed to invert polarity. A 30dB magnetic shield package is standard. Not recommended for mic splitter applications (use JT-MB-C).

Ideal retrofit to solve problems with transformerless preamps
Dual Faraday shields provides very high CMRR 122dB at 60Hz
Eliminates complex circuitry required to block phantom power
Excellent frequency response and time domain performance

Audio Transformer Type - Input Transformer
Spec Sheet available - Yes

Operating Temperature (Maximum): 158 F
Operating Temperature (Minimum): 32 F
Maximum Bandwidth: 180 kHz (-3dB)
Impedance Ratio: 150:150
Input Impedance: 2.9 kohms (1kHz, -20dBu, test circuit 1)
Voltage Gain: -0.26 dB (1kHz, -20dBu, test circuit 1)
Deviation from linear phase (DLP): +2.0 ° (20Hz to 20kHz, -20dBu, test circuit 1)
Distortion (THD): 0.045 % (20Hz, -20dBu, test circuit 1)
Maximum 20Hz input level: +2.0 dBu (1% THD, test circuit 1)
Common-mode Rejection Ratio (CMRR) 150 Ohms Balanced Source: 122 dB (60Hz, test circuit 2)
Common-mode Rejection Ratio (CMRR) 150 Ohms Unbalanced Source: 111 dB (60Hz, test circuit 3)
Output Impedance: 223 ohms (1kHz, test circuit 1)
Primary DC resistances: 46.4 ohms
Secondary DC resistances: 46.2 ohms
Capacitances at 1kHz: 62 pF (secondary to shield (BLK) and case (WHI))
Turns Ratio: 1:1.000

Microphone Input Transformer 188 kb - Data Sheet

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