This electrolytic capacitor bank 1.5 kJ has SCR (silicon controlled rectifier) switching to control peak currents of thousands of amps. Mostly to make big bangs but also to drive projectile devices such as a rail gun and coil gun.
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This is a version of a Tesla coil where the primary is driven by a vacuum tube (valve) oscillator. “Continue reading” for more details and photos.
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A working HeNe tube is shown below running at 2 kV with a 330 kohm resistor. It takes about 3 – 4 kV to trigger. It is shown firing through a 15,000 lines per inch diffraction grating and shows the first order spectra.
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