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从发现真空电子导电现象(爱迪生效应),到现在已经整整一百年了。从具有划时代意义的三极电子管诞生,到今天也将近八十年了。以三极管的发明为开端,在本世纪的前半期,电子管的发展取得了辉煌的成就,揭开了电子学历史的崭新篇章。 1883年,36岁的爱迪生在他埋头于改进白炽灯的时候,发现了一个有趣的现象。有一次,他把一个金属片封进白炽灯泡,将玻璃泡里的空气抽出以后,便开始实验。爱迪生接通灯丝电源,使灯丝达到白炽状态。当他把电流表接在金属片与灯丝正端之间时,电流表的指
It has been 100 years from the discovery of the phenomenon of vacuum electron conduction (Edison effect). From the birth of the epoch-making three-pole tube, it has been almost 80 years now. Beginning with the invention of transistor, in the first half of this century, the development of electron tube has made brilliant achievements and opened a new chapter in the history of electronics. In 1883, 36-year-old Edison discovered an interesting phenomenon while he was working to improve the incandescent lamp. Once, he sealed a sheet of metal into an incandescent light bulb and drew the air out of the glass bubble before experimenting. Edison switched on the filament to make the filament incandescent. When he ammeter connected between the metal sheet and the positive terminal of the filament, the ammeter refers to