This circuit covers the bands from 1.8 to 150 MHz, with plug-in coils whose characteristics are given next to the diagram. The FET can be a BF245. We found it in old documentation.
A Jacob's ladder is a high voltage effects device in which a spark passes between two V-shaped...
This 1975 circuit for automotive applications replaces the mechanical vibrator found in old cars...
This circuit can be used as shield or to drive powerful loads from low current switches such as...