A Turn-In-Gap Erase Head for Magnetic Recorders Providing Intense High-Frequency Fields

A new erase head structure has been devised for use in magnetic recording. This new head provides, at reasonable power inputs, much more intense erasing fields than were possible previously and thus makes the use of magnetically harder media feasible. This head is excited by a single conductor in the erasing gap. The gap conductor is energized by a single turn secondary winding of a transformer. Greater efficiency is achieved through the resulting reduction in head flux for a given magnetomotive force applied to the medium. Also, improved thermal characteristics increase the power handling ability of this head.