lee de forest of the triode , which made electrical amplification of weak radio signals and audio signals possible with a non-mechanical device. until , this field was called "radio technology" because its principal application was the design and theory of radio transmitters , receivers , and vacuum tubes...
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(june , ) — starting june , fireworks again will be legal for sale and discharge within the city limits of arkansas city. the sale and discharge of fireworks are permitted from a.m. to p.m. june through july , as well as from a.m. to midnight july . city officials urge citizens again at this time to...