This circuit was found in a 1964 Electronic Design. It generates opposite phase signals from an input signal. Modern equivalent transistors can be used in the same configuration.
This circuit with transistors was found in an old Japanese publication, translation of an American...
This 8 W amplifier with germanium transistors was found in a Japanese documentation from 1967. The...
This circuit of the 80's makes use of components of the time. The circuit is from an American...