This high-sensitivity circuit was found in a 1980s documentation. The source can be a 9 V battery with a splitter to make it symmetrical. The shock can be 200 uH or more.
This circuit was obtained in a documentation for radio amateurs from 1975. With it we can use a...
Only for reference this is a circuito f a commercial receiver of the year 1958. The circuit uses...
This circuit is from an old American publication. The indicated transistor is oversized as the 15 V...