This circuit is from Delco Radio found in a 1968’s documentation. The transistors are of the time and are not given information about the driver transformer. Note the high supply voltage.
This circuit was found in an old Philips publication. The circuit supplies a voltage corresponding to 4.5 V...
This circuit was found in Radio Electronics from the 90s. It uses a transconductance operational...
This 500 MHz oscillator has an output power of 1 W when powered by a 20 V source. The circuit was...