This circuit was obtained in an American documentation from the 80's. The transistors can be equivalent to those indicated and the crystal can reach a few tens of megahertz.
The MC1436 can also be used on this circuit found in Motorola's 1993 Linear Interface ICs. The...
We found this circuit in an application note from Linear Technology of the 90s. The circuit uses...
This unijunction transistor oscillator is intended for Morse code practice. The circuit is from an...