with saturated jig, e.g. for detecting second harmonic; balanced flux head

Full Title

Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor (G11B11/00 take precedence) > Structure or manufacture of heads, e.g. inductive > Structure or manufacture of flux-sensitive heads, ( ; general details therefor G11B5/133 - G11B5/255) > with saturated jig, e.g. for detecting second harmonic; balanced flux head