Presentations of various clandestine radio station recordings and interval signals. From www.dxing.com/clandest.htm "A clandestine radio station usually sounds like any other broadcasting station. However "legitimate" a clandestine station might sound, however, it is "extralegal" and deceptive in its operation. Here are some key elements that distinguish a clandestine broadcaster from "ordinary" broadcasters: 1) Clandestine broadcasters are deceptive. They often lie about their location, sponsoring government or organization, and their intentions. Programming is essentially propaganda, and may largely be half-truths or outright lies. 2) Clandestine broadcasters aim to bring about political changes or actions in a target country. They may want to incite revolution in another country or simply to influence the populace of the target country to be more sympathetic toward the country or organization operating the clandestine. 3) Clandestine broadcasters are temporary. Since the purpose of a clandestine is political, clandestine stations usually leave the air quickly when political situations change. Numerous clandestines were active in and around Vietnam during the late 1960s, but all went off the air when North Vietnam conquered South Vietnam in 1975.