Fidelity Research FRT-3

Step-up transformer for MC using toroidal core.

By developing and adopting a ring-shaped toroidal core, nonlinear distortion and noise components caused by hysteresis curve and Barkhausen effect are eliminated.

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Type Booster transformer
Primary impedance 10 ohm, 30 ohm, PASS (Switching)
Secondary impedance 12k ohm
Load impedance 47k ohm - 50k ohm
Boost ratio 10 ohm : 31 dB (36 times)
30 ohm : 26 dB (21 times)
Frequency band 20 Hz to 30 kHz
Distortion factor Measurement error occurs until output 2 vrms and judgment is not made.
External dimensions 64 mm wide x 64 mm high x 105 mm deep