| 单词 | crystal set |
| 释义 | > as lemmascrystal set crystal set n. a simple radio set consisting essentially of an aerial, a tuning device, and a crystal detector, and usually used with headphones.The simplicity of early crystal sets, in particular the fact that there was no need for an amplifier and they were easy to construct, meant that they quickly became very popular in domestic settings. ΘΚΠ society > communication > broadcasting > radio broadcasting > [noun] > radio set portable1900 wireless set1907 wireless1909 crystal receiver1910 radio1912 radio set1912 box1916 crystal set1921 crystal radio1922 receiver1930 car radio1931 clock radio1946 transistor set1953 transistor radio1956 steam radio1957 transistor1961 tranny1969 Casseiver1976 society > communication > telecommunication > radio communications > radio equipment > [noun] > radio set > receiver > types of crystal receiver1910 heterodyne1915 self-heterodyne1915 crystal set1921 crystal radio1922 superheterodyne1922 superhet1924 battery-receiver1928 battery-set1930 mobile unit1961 1921 Sci. Abstr. B. 24 416 Speech and music transmitted from Königswusterhausen by a valve transmitter on a 3600-m. wave was easily heard using the note magnifier ̧ but not on the crystal set. 1933 Pop. Sci. Monthly July 53/2 By building a crystal set, you can provide the children of the family with a cheap, satisfactory receiver of their own. 1943 C. L. Boltz Basic Radio xiii. 209 Some years ago thousands of people regularly used crystal sets for listening to broadcast programmes. 2001 Kenyon Rev. & Stand Spring 149 Radios with loudspeakers were naturally forbidden in the dormitory of my boarding school, but crystal sets were easily concealed. < as lemmas |
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