21. There are many examples of community radio stations being operated in the United States using carrier current AM broadcasting. 22. Higher power levels can be achieved using carrier current techniques, which are widely used in colleges and universities. 23. The " carrier current " innovation soon spread to other college campuses, especially in the northeastern United States. 24. The first incarnation of student radio at Sewanee was as an unlicensed AM carrier current station in early 1972. 25. Additional information on the 1968 Carrier Current station for KUPS can be found at www . engineer-exchange . com 26. Beginning in March, 1959, The station initially " broadcast " to the CUA campus via AM carrier current . 27. The station originally launched in 1991, as an AM carrier current station, broadcasting exclusively to the LSSU campus. 28. Previously, the station broadcast on the campus carrier current AM system, and had studios located in Nichols Gymnasium. 29. Around this time, the station's carrier current signal was rolled out to the new " Uptown " campus. 30. Being a carrier current station, the call letters were arbitrary, and KCAM referred to'K Colby AM '.