This very high voltage circuit was found in the 1990 special issue of Radio Electronics Experimenter magazine. The circuit consists of a Tesla coil.
In the original 1992 application, this passive circuit was intended for use in the car. At that...
In the figure we have the way of obtaining 220 V from two equal 110 V transformers or 230 V from...
This antenna for the frequencies 146 or 440 MHz was found in a magazine 73 for Amateur Radio of...