本文是介绍在普通袖珍收音机线路基础上,添加几个普通零件,改装成收音和记忆增强两用机。改装十分容易,所有添加零件可以放在原机内部空隙处。输入采用共基极放大电路,机内8 Ω扬声器直接作为送话器,因此,匹配特性好。经本人制作、使用,该机收音和记忆增强功能互不影响,声音宏亮,性能稳定。此外,该机还可作为助听器和跟读器等,十分实用。图1是一般收音机线路图,图2是改制后的线路图。添加零件为:BG,3AX31,Iceo小,β≥40,也 This article is introduced in the ordinary pocket radio line on the basis of adding a few ordinary parts, converted into radio and memory enhanced dual-use machine. Modification is very easy, all the added parts can be placed in the original machine internal voids. Input using a common base amplifier circuit, the machine directly into the 8-ohm speaker, so the matching characteristics are good. After I make, use, the machine radio and memory enhancements do not affect each other, loud and clear, stable performance. In addition, the machine can also be used as hearing aids and readers, etc., is very practical. Figure 1 is a general radio circuit diagram, Figure 2 is a modified circuit diagram. Add parts as: BG, 3AX31, Iceo small, β ≥ 40, also