| 31. | This occurs through devices such as a hollow cathode plasma contactors, thermionic cathodes, and field emitter arrays.
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| 32. | This phenomenon, known as thermionics, is not a new discovery _ Thomas Edison spotted it back in 1883.
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| 33. | After receiving his M . A . in 1905, he began research on thermionic emission in the Cavendish Laboratory.
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| 34. | The thermionic triode, a vacuum tube invented in 1907, enabled amplified radio technology and long-distance telephony.
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| 35. | The same year John Ambrose Fleming invented the Fleming valve or thermionic diode which could also rectify an AM signal.
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| 36. | The thermal converters ( whose output power is a function of a temperature differential ) include thermoelectric and thermionic generators.
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| 37. | The "'EL34 "'is a thermionic valve or vacuum tube of the power pentode type.
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| 38. | Hot metal will emit electron via Thermionic emission . talk ) 17 : 48, 18 November 2008 ( UTC)
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| 39. | Of course, the photoelectric effect may be used in the retarding mode, as with the thermionic apparatus described above.
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| 40. | He invented the thermionic diode 1873 ( this was later given alternate credit to Edison's assistant WJ Hammer ).
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