When we record signal on longitudinally oriented tape in VCRs, the unbalance of the output from + and - azimuth heads happens, because head output depends on angle between head magnetic field direction and tape orientation direction and moreover depends on azimuth angle. The track angle dependence of head output level was measured on Co-Ni obliquely evaporated tape (ME tape), and we optimized the azimuth angle, which can balance the output level.
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