This circuit was found in a Philips documentation from 1967. The circuit uses components from the time that have current equivalents such as BC548 for transistors.
This circuit appears in several versions in publications of the time and can be modified by...
This transistorized “grid dip” oscillator was found at Radio Electronics in June 1953. The...
This 12 V symmetrical power supply provides a current of the order of 100 mA according to the...