从六十年代初起，半导体器件开始走进市场。当然，初期的晶体管只有小功率低频管，是点接触式的锗管，种类也非常少。记得我最早买到的半导体器件是一种波兰生产的锗二极管，型号是DOG13。是一个极普通的二极管、只能取代矿石收音机中的矿石而已。可我至今记得它那小小玻璃管中 From the early 1960s, semiconductor devices began to enter the market. Of course, the early transistor only low-power low-frequency tube, is a point of contact germanium tube, the type is also very small. I remember the first semiconductor device I bought was a German-made diode made in Poland, model DOG13. Is a very ordinary diode that can only replace the ore radio ore only. But I still remember it in the small glass tube