| 1. | ENIAC was, like the thermionic valves ( vacuum tubes ).
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| 2. | Bell Labs did not develop a satisfactory thermionic diode for microwave reception.
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| 3. | Thermionic currents can be increased by decreasing the work function.
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| 4. | A thermionic diode is a plate ( anode ).
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| 5. | Semiconductor devices have replaced thermionic devices ( vacuum tubes ) in most applications.
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| 6. | The elecrons can be provided by thermionic emission and / or secondary emission.
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| 7. | However, Mahan's paper concluded that thermionic refrigeration couldn't work.
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| 8. | Mahan's original paper envisaged two major obstacles to room-temperature thermionics.
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| 9. | The thermionic valve was invented in 1904 by the English physicist John Ambrose Fleming.
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| 10. | The war increased demand for such instruments and the War Office needed experimental thermionic valves.
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