Other amplifiers of the series like the MC3301, MC3401 and LM2900 can be used in this circuit. We found this setting on Motorola's Linear Interface ICs. The circuit uses a magnetic sensor.
This commercial transistorized intercom had this diagram published in Radio Electronics magazine in...
This circuit has a maximum output current of 5 A, and the 2N3055 must have an excellent heat sink....
This circuit is from 1986 documentation, being adaptable in radios of that time. The circuit uses the...