Four-fold step-down transformer with 10K:600 input transformer for R25 microphone signal audio DI instrument box circuit

Permalloy microphone signal audio DI instrument box circuit uses 10K:600 input transformer 4 times step-down transformer, suitable for signal step-down and attenuation, impedance ratio and so on.

The input impedance of 10K is converted to 600 ohms by transformer, and the signal-to-voltage ratio is 4:1. 10K input 1V signal voltage, 600 Euro winding output voltage is 0.25V, signal voltage 4 times reduced, on the contrary, signal current 4 times enhanced, sound density increased, more dynamic details can be heard. This is impossible without connecting transformers.

Using imported permalloy iron core with 85% nickel content and single core thickness of 0.15mm, the thickness of the core is as thin as cicada wings, the effect is excellent.Domestic high-quality oxygen-free copper enameled wire, CNC micro-computer automatic winding machine winding, to ensure smooth and orderly wrapping, multi-layer multi-section, forward and backward winding, dislocation wiring and other complex ways of winding, successfully improve a good transformer must have high inductance, low leakage inductance, low distributed capacitance, broadband response and other requirements.

Transformer manufacturing process is rigorous and complex, professional and dedicated. Permalloy shield shielding, high quality epoxy resin encapsulation, avoid transformer contact with the outside world, effective protection circuit.

Measured Frequency Response: 22Hz~45KHz:-0.3DB

Primary DC Resistance: 1000R or so

Secondary DC Resistance: Around 250R

Primary inductance: about 1400H

Secondary inductance: about 80H

Maximum passable current 15 mA