This circuit with a differential pair was found in the August 1974 Radio Electronics magazine. The frequency is determined by L1 and the variable capacitor.
This circuit was found in the July 1990 Radio Electronics magazine. It is based on the 3-digit...
This circuit can be used on sound mixers to obtain effects. We found the circuit in a 1997...
This oscillator uses a ceramic resonator to determine the frequency. This kind of element is found...