This circuit was suggested by General Electric in a 1969 documentation. The transistors are of the time and the power supply is not given. Note the high supply voltage.
This old fashioned amplifier can source some watts to a low impedance loudspeaker. The circuit...
This circuit is from an American 80's documentation. The integrated circuit is of the time and is no...
This circuit is from Mullard documentation from 1969. Transistors support current equivalents. Output...