A new magnetic recording head fabricated from coaxial wire

A new head fabrication technique is described and the experimental performance reported. The device is a single-turn head suited for head-per-track operation. The head strip is produced by rolling fiat a metallic cylinder consisting of an outer jacket of magnetic material surrounding an inner core of nonmagnetic conductor. Lapping off the bottom of the fiat strip creates the gap and the addition of current leads completes the head configuration. The number of leads determines the number of heads. Mounted into a flying shoe, the head was sine-wave tested by writing with increasing head current and then by observing the read-back signal with frequency as the parameter. The write process is unusual in that the saturation write current decreases sharply with increasing frequency.