现行高中《物理》的安排是以毫安表和微安表测量来演示晶体三极管的放大作用(高中《物理》下册第223页图7—21),而将晶体管放大器作为选学内容。这样安排,使学生对晶体三极管的放大作用,印象相当肤浅。我在教学中,讲过这一节后,采用三极管单管放大电路与矿石收音机(或二极管收音机)配合,演示三极管放大作用的实际应用,使学生对这一知识加深印象。制做一、矿石收音机(或二极管收音机)矿石收音机是五六十年代无线电爱好者所用的耳机式不用电源的收音机,其中的方铅矿等矿石也 The current high school “Physics” arrangement is to demonstrate the amplification effect of the transistor using milliampere and milliammeter measurements (high school “Physics” second volume, page 223, Figure 7-21), and the transistor amplifier as the content of the school. This arrangement allows students to have a superficial effect on the amplification of the transistor. In my teaching, after talking about this section, I used a triode single-tube amplifier circuit to cooperate with the ore radio (or diode radio) to demonstrate the practical application of the triode amplification effect, so that students can deepen their impression of this knowledge. To make one, ore radio (or diode radio) ore radio is a headset-style radio without radio used by radio amateurs in the 1950s and 1960s, including galena and other ores