Nikola Tesla was a Serbian-American inventor, electrical engineer, mechanical engineer, physicist, and futurist. He was widely known for his contribution to the creation of devices that operate on alternating current, multiphase systems and the motor will make a so-called second phase of the industrial revolution. Tesla has received universal recognition as the outstanding electrical engineer and inventor. This book contains Tesla’s ideas and drafts about radio, how it really works. This work includes schemes and pictures of the principles of its work. Read the book to know basic elements of radio. This book will be useful for people who are interested in Tesla’s activity!