Found in an American publication from 1968, this circuit can be made based on a TIP42 that must be mounted on a heat sink. The transformer is 25 V with a current of 3 to 4 A.
This circuit was obtained from a 1966 documentation. The transistors are of the time. The circuit...
Using 3 ports, this rectangular oscillator was found in the March 1996 issue of Electronics Now...
With this circuit it is possible to vary the resistance by adjusting the mark/space reaction of...