The Magnetic Amplifier is an interesting device, once used as rugged, maintenance-free alternative to the fragile electron tube before power transistors were perfected.
These are essentially A.C. amplifiers, with primary and secondary windings similar to an ordinary transformer. But the primary coil is driven with D.C. and serves to saturate the ferrous core to varying degrees, which changes the reactance of the secondary. Through this, the amplification of small signals is obtained.
These are essentially A.C. amplifiers, with primary and secondary windings similar to an ordinary transformer. But the primary coil is driven with D.C. and serves to saturate the ferrous core to varying degrees, which changes the reactance of the secondary. Through this, the amplification of small signals is obtained.