Signal Processing Systems : Audio Transformers : Jensen Transformers, Inc. - JT-10KB-DPC

Line Input Transformer with 4:1 Turns Ratio

Model: JT-10KB-DPC

Ideal for balancing any high-impedance unbalanced input
Wide bandwidth -3dB at 0.5Hz and 180kHz
Recommended for levels up to +21dBu at 20Hz
High input impedance of 40kohm
High common-mode rejection of 120dB at 60Hz

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Line input transformers provide the maximum possible Common Mode Rejection of unwanted signals. All models have a single Faraday shield and a 30dB magnetic shield can. Models are available in 1:1, 1:1.4, 1:2, 2:1 and 4:1 ratios. Several models are also available as octal plug-in versions. This transformer is designed for use in wideband line input stages. The secondary source impedance of only 225ohm is an excellent match to ultra-low noise amplifiers. The primary is fully balanced and its leads may be reversed to invert polarity, if required. A 30dB magnetic shield package is standard.

Ideal for balancing any high-impedance unbalanced input
Wide bandwidth -3dB at 0.5Hz and 180kHz
Recommended for levels up to +21dBu at 20Hz
High input impedance of 40kohm
High common-mode rejection of 120dB at 60Hz

Audio Transformer Type - Input Transformer
Audio Transformer Type - Line Transformer
Spec Sheet available - Yes

Operating Temperature (Maximum): 158 F
Operating Temperature (Minimum): 32 F
Maximum Bandwidth: 180 kHz (-3dB)
Impedance Ratio: 40k:2.4k
Input Impedance: 41.5 kohm (1kHz, +4dBu, test circuit 1)
Voltage Gain: -12.9 dB (1kHz, +4dBu, test circuit 1)
Magnitude response, ref 1 kHz: -0.04 (20Hz, +4dBu, test circuit 1, Rs=600ohm) and -0.03 (20kHz, +4dBu, test circuit 1, Rs=600ohm) dB
Deviation from linear phase (DLP): +0.6/-0.1 degree (20Hz to 20kHz, +4dBu, test circuit 1, Rs=600ohm)
Distortion (THD): <0.001 (1kHz, +4dBu, test circuit 1, Rs=600ohm) and 0.015 (20Hz, +4dBu, test circuit 1, Rs=600ohm) %
Maximum 20Hz input level: +21 dBu (1% THD, test circuit 1, Rs=600ohm)
Common-mode rejection ratio (CMRR) 50ohm balanced source: 120 (60 Hz, test circuit 2) and 85 (3kHz, test circuit 2) dB
Common-mode rejection ratio (CMRR) 600ohm unbalanced source: 90 (60Hz, test circuit 3) and 55 (3kHz, test circuit 3) dB
Output Impedance: 225 kohm (1kHz, test circuit 1, Rs=600ohm)
Primary DC resistances: 2.5 kohm (RED to BRN)
Secondary DC resistances: 92 kohm (YEL to ORG)
Capacitance at 1kHz: 120 (primary to shield and case) and 115 (secondary to shield and case) pF
Turns Ratio: 4.000:1
Breakdown Voltage: 250 Vrms (primary or secondary to shield and case, 60Hz, 1 minute test duration)