Invented by Nikola Tesla back in 1891, the Testa coil can boost power from a wall socket or battery to millions of high-frequency volts. In this booklet, the only systematic treatment of the Tesla coil for the electrical nonexpert, you’ll find a wealth of information on one of the best-kept secrets of electric technology, plus all the facts you need to build a Tesla coil on any scale. How Tesla built it. How you can from off-the-shelf parts. What is a beer-bottle capacitor? A well tuned coil is harmless but can perform amazing tasks. A look at low-draw high-frequency lighting, ozone generation, electrotherapy, electrochemistry, radio transmitting. Also includes an introduction to the megapower Tesla coil called the magnifying transmitter. 26 illustrations.