我局为了早日播出彩色电视,在前几年国内缺乏大功率发射管的情况下,采用并管方式自行设计并试制了20千瓦彩色电视发射机。它于1974年年底正式投入广播。通过三年多播出使用证明,机器运行稳定、效果较好。它是我国第一部大功率彩色电视发射机。该发射机体积小、重量轻、结构简单、维修方便,适合于高山工作。其技术特点和工作原理介绍如下。 In order to broadcast the color TV at an early date, our bureau designed and trial-produced a 20-kilowatt color television transmitter by means of parallel management in the absence of high-power launch tubes in China a few years ago. It was officially put into radio at the end of 1974. After more than three years broadcast the use of proof, the machine runs stably, the effect is better. It is China’s first high-power color TV transmitter. The transmitter is small, light weight, simple structure, easy maintenance, suitable for mountain work. Its technical features and working principle are described below.