This traditional circuit generates a 200 Hz sinusoidal signal. The frequency depends on the capacitors and the transistor can be a BC548. We found this circuit in a 1979 documentation.
This transistorized “grid dip” oscillator was found at Radio Electronics in June 1953. The...
This circuit has a very traditional configuration that can be found elsewhere on the site. R2 and...
This high input impedance amplifier stage was found in a 1963 documentation. The transistor...