a rotary transformer circuit , for a video cassette recorder , including : a single rotary transformer ; a plurality of magnetic heads for recording / playing back signals on the magnetic tape ; and a switching circuit for selectively sampling each of the plurality of magnetic heads and for forming a signal of concatenated individual - head sub - signals and for selectively connecting a signal of concatenated individual - head sub - signals to corresponding ones of the plurality of magnetic heads . the switching circuit transferring the signal of concatenated individual - head sub - signals through the single rotary transformer . the circuit avoids noise caused by cross - talk when using multiple rotary transformers .