thermionic valve love

thermionic valve


from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun An early electronic device incorporating electrons from a glowing cathode inside an evacuated glass tube; functioned as a switch, amplifier etc.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope


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  • "... Fleming directed the hurt of his rejection into work aimed at winning his way back into Marconi's favor. He invented a device that in time would revolutionize wireless, the thermionic valve. He wrote to Marconi, 'I have not mentioned this to anyone yet as it may become very useful.' Soon afterward he invented another device, the cymometer, that at last provided a means for the accurate measurement of wavelength. He told Marconi about this as well."

    —Erik Larson, Thunderstruck (New York: Crown Publishers, 2006), 270

    July 7, 2009

  • simple definition - an amplifier vacuum tube.

    December 5, 2015