This circuit was obtained from an American documentation from the 90's. Inductors are critical components of the circuit. The output is 120 V sinusoidal.
This circuit with unijunction transistors was found in a documentation from the 80's. The trigger...
In this circuit of an old American documentation, the input impedance is the same as the output...
In the figure we have the way to obtain a voltage of 18 V from a 6.3 V transformer with central...