在党的“十大”召开前夕,我国自行设计、自行制造的第一台7.5瓩彩色电视发射机在上海无线电三厂试制成功。这台发射机全部零件都系国产,其图象、伴音激励级以及高压、低压的稳压电源等都采用晶体管,还采 On the eve of the “Top Ten” of the party, China’s first self-designed and self-made 7.5-ton color TV transmitter was successfully trial-produced in Shanghai Radio Third Factory. All of this transmitter are made of domestic parts, the image, sound-driven level and high-voltage, low-voltage power supply, etc. are using transistors, but also mining