本文所介绍的是一种无源单管调频发射机,它可将放大器和卡拉OK输出的声音发送到其他调频设备上。该电路工作原理新颖,且简单易作。 本机最大的特点是从收音机或录音机的扬声器输出端子取出信号,经处理后来代替电池。图1为该机的完整电路图,为了正常工作,先估算整机的消耗功 This article describes a passive single-tube FM transmitter, which can send the amplifier and karaoke OK sound output to other FM devices. The circuit works novel, and easy to make. The biggest feature of this unit is that it takes out the signal from the speaker output terminal of the radio or the recorder and processes it to replace the battery. Figure 1 for the complete circuit diagram of the machine, in order to work properly, first estimate the power consumption of the machine