MOVING-MAGNET CARTRIDGES
The most common generating method is to mount a magnet on the back of the cantilever. As the motion of the stylus and cantilever causes the magnet to move, the magnetic properties change in the nearby coils and signals (voltages) corresponding to the mechanical changes are generated.
Moving-magnet cartridges are less costly to manufacture since the coils can be machine-wound. They have high output and when the stylus wears out, simply slide the old stylus assembly out of the body of the cartridge and slide a new one in.
The magnetic pickup is a current-operated device. The construction of magnetic pickups varies greatly. The movable magnet is damped. This is accomplished in a number of ways, depending on the construction ...
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