收音对讲两用机＠李新胜收音对讲两用机简易型的调频无线对讲机，由于普遍存在灵敏度低、无静噪功能及使用电压高等缺点，因而很不实用。本文所介绍的收音、对讲两用机，有如下特点：１采用成品ＦＭ收音板改制，性能优良，制作简单。２具有静噪功能，等待时无噪声。３灵敏度很高... Radio intercom dual-use machine @ Li Xinsheng radio intercom dual-use simple type of FM wireless intercom, due to the prevalence of low sensitivity, no noise suppression function and the use of high voltage shortcomings, it is not practical. Introduced in this article radio, intercom dual-use machine, has the following characteristics: 1 using the finished FM radio board restructuring, excellent performance, production simple. 2 has a mute function, waiting no noise. 3 high sensitivity ...