TRANSFORMATOR 1:1 600-600 OHM OPEN

600 ohm audio-frequency transformer 600 : 600, Audio isolation transformer 1:1, Toroidal with 5 pins 

One point is to explain the impedance problem of the coupled isolating transformer: this transformer is 600 ohm: 600 ohm audio transformer, the impedance 600 ohm refers to the AC impedance, and the actual multimeter is a DC impedance, at about 100 ohm.

Frequency Range: 50Hz--100KHz

AC Impedance Ratio: about 600 : 600 ohm

Inductance: about 1.6H

Withstand Voltage: 1000V above