On June 13, 1938 the United States Senate adopted Resolution 294, "Limitation of Power of Radio Broadcast Stations", commonly known as the Wheeler resolution. Introduced by Senator Burton K. Wheeler, it recommended that the Federal Communications Commission fix the maximum power used by AM broadcasting stations at 50,000 watts. Shortly thereafter the FCC formally adopted the suggested 50,000 watt cap, which still remains the limit.
Background
On June 9, 1938, Senator Wheeler submitted a resolution for consideration by the full body: At the time this resolution was introduced, FM and TV stations did not yet exist, and there were fewer than 700 AM stations, many struggling economically due to the effects of the Great Depression. In 1928, under the provisions of the Federal Radio Commission's General Order 40, broadcasting stations had been divided into three main categories: "local", limited to 100 watts, "regional", limited to 1,000 watts, and "clear", generally capped at 50,000 watts. Subsequently, the daytime maximum for local stations had been raised to 250 watts, and to 5,000 watts for regional stations. Wheeler's resolution was related to the fact that the FCC was preparing to hold a series of hearing reviewing the future of the AM broadcasting band, including transmitting power levels. In 1938 there already was one station, WLW in Cincinnati, Ohio, operating with significantly higher power than 50,000 watts. Beginning in 1934 WLW received a series of temporary authorizations to use 500,000 watts, moreover, the FCC had received applications from more than a dozen additional stations to start using powers above 50,000 watts. The prospect of numerous "superpower" stations made many lower powered stations concerned that they would be "drowned out" and unable to compete economically, which would lead to a reduction in the number of operating stations. Wheeler, an avid anti-monopolist, also warned that domination of the airwaves by high-powered stations could lead to the rise of a dictator like Mussolini in Italy, Hitler in Germany or Stalin in the Soviet Union, each of whom used control of radio broadcasting to aid their seizures of power. Wheeler's Resolution 294 was adopted by the full senate on June 13. Although Senator Robert J. Bulkley entered a motion to reconsider the vote, he withdrew the motion the next day. A resolution, unlike a law, was not binding on the FCC, however it was seen as having an important influence on the outcome of its hearings.
Impact
After concluding the hearings, in early 1939 the FCC announced its new regulations, which narrowed the power differences between low and high-powered stations. Local stations could now use up to 250 watts at night, and regional stations 5,000 watts. On the other hand, in language that largely echoed the financial arguments of the Wheeler resolution, clear channel stations were still limited to 50,000 watts, and WLW's authorization to use 500,000 watts, except experimentally during early morning hours, was terminated. Although subsequently many AM stations in other countries, especially in Europe and Asia, would use far greater powers, in the United States the Wheeler resolution's 50,000 watt cap has remained in place.
