Oudin coil
The Oudinspule, also referred to as Oudin resonator is a historical electrotechnical structure for generating high-frequency alternating voltage. The name goes back to the French urologist Paul Marie Oudin, who carried out this first work in 1899, together with the French physicist Jacques- Arsène d' Arsonval.
Design and functional principle
In principle, the Oudinspule is a Tesla transformer without an iron core, a type of resonant transformer. In contrast to the Tesla transformer only one winding is used, which provides a so-called Oudinspule autotransformer represents the AC voltage generated depending on the system has frequency of some 10 kHz, the generated voltages amount to some 10 kV at idle. The achievable performances are comparatively small, upon contact with the high voltage breaks this almost instantly to safe values together.
Almost at the same time Nikola Tesla experimented on the Tesla transformers named after him.
Application
Application found the Oudinspule in 1900 and subsequent years as diathermy healing device, were popular and novel at a time when various electro-medical experiments. The form of treatment is not scientifically recognized, the Oudinspule is still sometimes used to pseudo-medical purposes.
A Oudin resonator can be converted into an early form of the radio receiver, receiving the detector receiver so called, which strong medium wave transmitter and can make it audible in headphones.