This converter or inverter uses components that are still common. The transformer is the type found in old tube equipment. The power transistors must be mounted on heat radiators.
This circuit was found in Radio Electronics from the 90s. It converts capacitance into frequency...
I found this little signaling transmitter in old American documentation. The circuit has a good...
This is the traditional version of a neon flasher, found in a 2004 documentation. The capacitor...