This circuit was obtained from an American 1980s documentation. The frequency depends on the crystal and the circuit may be a PNP that reaches the generated frequency.
A frequency of up to a few kilohertz can be obtained with this oscillator. The frequency is given...
We found this circuit in a publication by General Electric in the 1980s. The transistors and the...
This circuit was found in a Radio Escuela Gráfica magazine from Argentina published in the 70's....