Oudin coil
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An Oudin coil, also called an Oudin oscillator or Oudin resonator, is a resonant transformer circuit that generates very high voltage, high frequency alternating current electricity at low current lev
Treatment of knee by effluvium method using Oudin coil, 1907. The pointed electrode with insulated handle (B), attached to top of the coil, is directed at knee. The patient holds a "ground" electrode (A) attached to the coil bottom. Note operator's other hand (D) adjusting coil.
Oudin electrotherapy outfit. Includes the Oudin coil (right rear), induction coil which powers it (center rear), power panel with mercury interrupter (left rear), and condensing bed (foreground)
A vacuum electrode.
A vacuum electrode in operation showing violet glow
Resonator
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A resonator is a device or system that exhibits resonance or resonant behavior. That is, it naturally oscillates with greater amplitude at some frequencies, called resonant frequencies, than at other
RF cavities in the linac of the Australian Synchrotron are used to accelerate and bunch beams of electrons; the linac is the tube passing through the middle of the cavity.
A sport motorcycle, equipped with exhaust resonator, designed for performance
A Dobro-style resonator guitar