![Tesla at a banquet](/sites/default/files/styles/default_extra_large/public/theme-images/hero-images.jpg?itok=vaECt2og)
Nikola Tesla Images and Photographs
Images and photographs of, or related to, Nikola Tesla
Tesla's ultra-sensitive wireless detector
Fig. 9. — The Forerunner of the Audion — the Most Sensitive Wireless Detector Known, as Described by Tesla In His Lecture Before the Institution of Electrical Engineers, London, February, 1892.