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Galena crystal detector Germanium diode used in modern crystal radios (about 3 mm long) How the crystal detector works. [86] [87] (A) The amplitude modulated radio signal from the tuned circuit. The rapid oscillations are the radio frequency carrier wave.
Crystal radios had no amplifying components to increase the loudness of the radio signal; the sound power produced by the earphone came solely from the radio waves of the radio station being received, intercepted by the antenna. Therefore, the sensitivity of the detector was a major factor determining the sensitivity and reception range of the ...
It was used as the crystal in crystal radio receivers, in which it was used as a point-contact diode capable of rectifying alternating current to detect the radio signals. The galena crystal was used with a sharp wire, known as a "cat's whisker", in contact with it. [28] In modern times, galena is primarily used to extract its constituent minerals.
Then we can make a request at WP:RM#Uncontroversial technical requests for Crystal detector (radio) to Crystal detector. Glrx 22:55, 8 May 2018 (UTC) Made the request. Glrx 23:03, 8 May 2018 (UTC) Agree w/ deletion. @Dicklyon: Thanks for the input. My feeling is there is a natural break between "historical" and "modern" detectors around 1930 ...
Prior to the introduction of the Audion, radio receivers had used a variety of detectors including coherers, barretters, and crystal detectors. The most popular crystal detector consisted of a small piece of galena crystal probed by a fine wire commonly referred to as a "cat's-whisker detector". They were very unreliable, requiring frequent ...
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Although Bose's work was not related to communication he, like Lodge and other laboratory experimenters, probably had an influence on other inventors trying to develop radio as communications medium. [31] [32] [33] Bose was not interested in patenting his work, and openly revealed the operation of his galena crystal detector in his lectures. A ...
Greenleaf Whittier Pickard (February 14, 1877 – January 8, 1956) was an American electrical engineer and inventor. He was largely responsible and most famous for the development of the crystal detector, the earliest type of diode detector, although he was not the earliest discoverer of the rectifying properties of contact between certain solid materials. [1]
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