This oscillator uses a crystal to set the frequency. The operating limit of the unijunction is in the order of 100 kHz. Power supply can be between 10 and 20V.
This configuration appears several times on this site. The circuit can generate a 100 kHz or other...
This circuit, from a 1973 publication, shows how to obtain a fast, low impedance output for a 741....
This 1969 Popular Electronics circuit was based on the then recently released BC109, today with...