We found this circuit in a 1966 US documentation. It simulates a variable capacitor that can vary capacitance from 1,000 to 1. Transistors are general purpose types.
e find this circuit in documentation for radio amateurs of 1974. The unijunction transistor can be...
This circuit was found in an American 1960s documentation. The circuit uses transistors of the...
In the figure we have a circuit that produces interval pulses, reproduced in the piezoelectric...