We found this circuit in a 1966’s General Electric documentation. The circuit uses diodes in unique GE packages, available at the time.
This small earphone amplifier with germanium transistors was obtained in a Japanese publication from...
This powerful regulator, shown in the figure is for 5V (TTL) is suggested by Motorola and makes use...
We found this circuit in an English publication in 1991. The circuit can be assembled with...