This 9 V battery eliminator was found in Radio Electronics magazine from June 1966. The transistor is of medium power and must be equipped with a small heat sink.
This circuit has a gain of 34 dB and a good power to be used as an audio booster in cars. The...
This circuit was obtained from Dutch documentation from 1967. It uses transistors of the time...
Found in an Electronic Design this circuit controls a headlamp by triggering a time determined by the...