With the indicated components, this circuit oscillates at 1232 Hz. Consider the tolerance of the components. The circuit is from a 1974 Ferranti transistor manual.
We found this circuit in a 90's Radio Electronics. The low power circuit activates a 12 V relay...
This circuit was obtained from Dutch documentation from 1967. It uses transistors of the time...
This circuit has its battery charged by a solar system. The circuit uses components that admit...