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Consumer Electronics by S. P. Bali

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FREQUENCY RESPONSE

The degree of magnetisation of the tape which results from recording with a current through the head, which is constant at all frequencies, is of the form shown by the curve ABC of Fig. 11.8. The reduced intensity in the treble region is attributable to self-demagnetisation of the tape.

 

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Fig. 11.8 Tape record-playback characteristics

 

To outline the recording process briefly, the tape is drawn steadily past the recording head, and the field produced by the signal current in the head induces some degree of residual magnetism in the section of the tape nearest to the head. The amplitude of the signal governs the amount of ...

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