This circuit has the spark duration controlled by a 555 timer. The circuit was found in the 1990 special issue of Radio Electronics Experimenter magazine.
This circuit was obtained in a 1990 documentation and can be powered by the previous circuit...
This RF amplifier step has a dynamic range of 140 dB and can amplify signals from 0.5 to 40 MHz....
This oscillator with different outputs has frequencies selected by the S2 switch in 3 bands. We...