In addition to the above applications, the Tesla coil circuit was also used in x-ray machines, ozone generators for water purification, and induction heating equipment until the 1920s and 1930s, when vacuum tube oscillators replaced it in all these applications.
In addition to its use in spark-gap radio transmitters and electrotherapy, the Tesla coil circuit was also used in x-ray machines, ozone generators for water purification, and induction heating equipment. However in the 1920s vacuum tube oscillators replaced it in all these applications.