| 单词 | acorn tube |
| 释义 | > as lemmasacorn tube acorn tube n. Radio now historical a small high-frequency vacuum tube resembling an acorn in both size and shape. ΘΚΠ the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > thermionic valve > [noun] > vacuum tube or thermionic valve vacuum tube1859 trigger tube1894 audion1906 pliotron1915 diode1919 electron tube1919 negatron1919 pentode1919 power valve1919 tetrode1919 triode valve1919 magnetron1921 bright emitter1923 peanut valve1923 peanut1924 power tube1924 multiple valve1929 thyratron1929 heptode1932 hexode1933 pentagrid1933 acorn tube1934 octode1934 triode-pentode1936 triode-hexode1937 transitron1939 trochotron1947 steering diode1957 1934 Electronics Sept. 282/1 The ‘acorn’ tubes which amplify, oscillate, and detect waves as short as 40 centimeters have now reached the stage of practical manufacture. 1955 Derrick (Oil City, Pa.) 7 Jan. 3/1 While this radio is much larger than Hoover's smallest it also contains only one tube, an acorn tube. 2004 A. D. Helfrick Electronics Evol. Flight iv. 72 One successful vacuum tube for frequencies up to about 900 MHz was made by the Radio Corporation of America and was called an ‘acorn tube’. < as lemmas |
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