When was broadcasting invented?

At the end of last century and the beginning of this century, the invention and use of radio broadcasting opened a brand-new page in the history of foreign propaganda. 1895, Italian Marconi and Russian popov invented the radio almost at the same time, but Marconi got the international patent first. Since then, transmitting and receiving equipment has appeared, and has been continuously improved in a short time, reaching the level of a large number of use. Countries all over the world are competing to build radio stations and produce radios. With the increasing transmission power, especially the use of short-wave frequency, radio waves travel farther and farther, even across national boundaries, so international broadcasting has gradually emerged.

The first radio station in China was run by foreigners. 1923 At the beginning, American businessman Osborne set up a 50-watt radio station in Shanghai. Although it has only been running for half a year, it is the first radio station in China. Shortly thereafter, foreigners started similar radio stations in Shanghai, Tianjin, Beiping and Harbin. They mainly broadcast commercial information and advertisements, supplemented by entertainment programs, and news accounts for a small proportion. The first radio station run by China people was Harbin Radio Station, which started at 1926 and 10, with the call sign XOH and the transmission power of100W. 1 92865438+1October1The transmission power is increased to 1 kW, and the call sign is changed to COHB, which is broadcast in Chinese, Russian and Japanese.