Learning Event 6:
DESCRIBE THE PURPOSE AND USE OF MAGNETIC HEADS
Magnetic heads. No assembly in a magnetic recording system is more important
than the heads. These convert the electrical current to a magnetizing force during
the record operations, and convert the magnetizing force to an electrical current
a. If a core of permeable material is inserted within a coil of wire with
direct current running through it, a magnetic field is set up that will influence
any nearby material that is capable of being magnetized.
but current, which is varying in amplitude, and frequency, to conform with a
person's voice or music.
c. The core (item 1, fig 1-10) is shaped like an incomplete ring.
discontinuity forms the gap (item 3, fig 1-10) which is inserted in a coil (item 2,
fig 1-10) of wire.
d. When the signal to be recorded is converted to an electric current and
passed through the coil, a strong magnetic field is created across the gap.