The circuit is from Ferranti's 1974 transistor manual. Transistors are general purpose types, and the output waveform is rectangular. Components can be changed to other frequencies.
This traditional rectangular oscillator configuration generates signals up to a few megahertz...
This circuit is just a curiosity found in a 1990 documentation, since the integrated circuit used...
This circuit goes into operation producing a sound on a small speaker when the supply voltage...