Radio is the oldest electronic media and is very flexible, although today many other emerging media. The advantages of broadcast radio is that it can be enjoyed anywhere and in a variety of activities, with various types of gadgets. Radio can also be used by advertisers to promote a product that is designed specifically for a particular audience. Radio broadcasts dubbed the fifth power (Fifth Estate) after a newspaper, because it can perform the function of social control as well as newspapers, in addition of course to run the four functions of other media, namely; to inform, entertain, educate and persuade. Radio is always synonymous with a radio network of the various regions or countries, either because of the interest, the foundation, as well as a common vision and mission. One of the famous is HAM Radio network or DX site.