There are plenty of cool Tesla coils on the market for physics enthusiasts. This Oudin Coil is great for classroom demonstrations. It has an adjustable voltage input from 20,000 to 50,000v. It measures 14″ long and can light spectrum tubes and fluorescent bulbs.
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A safety switch is also included for safe operation. The Oudin Coil is available for under $250 at this time.
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