Transformer Audio Isolator 600 Ohm (=)

Frequency Range: 50Hz--100KHz AC Impedance Ratio: about 600 : 600 ohm Inductance: about 1.6H 600 ohm audio-frequency transformer 600 : 600, Audio isolation transformer 1:1, Toroidal with 4 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.