We found this circuit in a 1965 Electronic Design. Transistors are still common but admit equivalents for some of them. The circuit drains a current of only 4 mA.
This traditional triplier configuration with the 555 can be found in other articles on the...
This transistorized oscillator, a modification of the Colpitts oscillator, was found in the...
This circuit is from 1995 documentation. The power depends on the transformer, which in this case...