This circuit was found in an Electronics World of 1966. It has a range of 5 to 25 000 Hz at 1 dB and the diagram includes the power supply.
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
With the indicated components, this circuit oscillates around 3.6 kHz. The components can be...
This interesting configuration was found in a 1965s Electronic Design. It makes use of components of...