Word: detectors
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Dates: during 1920-1929
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...talking movie is an invention of Dr. Lee de Forest, the inventor of the audion detector and other radio devices. He has dubbed it, to distinguish his invention from others of the same kind, the "Phonofilm...
...whole object of radio frequency amplification is to amplify the energy before it gets to the detector," declared Mr. E. B. Dallin in a lecture last night to the Wireless Club at the Cruft High Tension Laboratory. He pointed out that this was essential in securing the maximum of sound without sacrificing clearness. He then diagrammed the various methods of setting up a set by which one can increase the intensity of sound without being troubled by excessive sputtering from the instruments. Mr. Dallin discovered in particular the relative disadvantages of the regenerative, crystal, and reflex receiving outfits, favoring...
...some of the amateurs to embark in the business of making and selling wireless apparatus. The ordinary things were all homemade. In fact, it was impossible to buy some transmitting apparatus at all. Mr. Lee DeForest then brought out what he was pleased to term the "Audion" detector. It was a little incandescent lamp, with one or two fixings on it, and it was intended to take the place of the crystal of galena ore, or the bit of silicon. But it was found to be thousands of times more sensitive than the bit of galena or silicon. Immediately...