We found this circuit in the Radio Electronics magazine of May 1977. The circuit has the frequency given by the components according to the formula next to the diagram.
This circuit for frequencies of 20 to 2 kHz was obtained in English documentation from 1966. The...
The oscillator of this circuit operates around 8 MHz, but the output will be at a frequency three times...
This circuit with transistors of the time was found in the magazine Radio Electroinics of June of...