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NATIONAL ' ASSOCIATION OF EDUCATIONAL BRQMDCnSTHaU Service Report Jane, 1947 SETTING UP THU PM S T A T .1 0 N By Ulmer G. Sulzer The University of Kentucky THU m PICTURE FOR EDUCATIONAL INSTITUTIONS : Right now, educational institutionshave an opportunity to get into radio and own their own stations, that may never oe duplicated again. With the standard "broadcasting "band "bursting at the seams, Frequency Modulation is the college J s hope. Twenty channels, ranging from 88,100 kilocycles to 91,900 kilocycles, with a two hundred kilocycle separation, are reserved for the exclusive use of non-commercial educational agencies. Rules and requirements for such agencies are much less exacting than those required "by the Federal Communications Commission of commercial Broadcasters. Furthermore, these educational "bands are not crowded just now. There is the danger, however, that unless more interest is shown in these frequencies in the future, some may he taken away from educators and allotted to commercial interests, which are applying in great numbers for construction permits on the other portions of the FM hand, WHERE TO PLACE THU STATION For truly efficient operation, the studios, transmitter, and antenna should he located at the same point. The studios and transmitter should he located in the same layout (a) to avoid the maintenance of two sets of engineers and the occupancy of two sets of real estate, and (h) because the conventional telephone circuits used to transmit AM programs from studios to transmitter are inadequate for FM, and specially engineered circuits that will retain the FM frequency range would he prohibitive in cost for the usual educational organization. The antenna must he placed very close to the transmitter because there is a high loss in the co-axial cables used to convey the high frequencies between transmitter and antenna. While the losses vary according to power, size of cable, etc,, it can be safely assumed that if the antenna is as much as 500 feet away from the transmitter, half the power of the latter will be lost by the time it reaches the antenna. Since the co-axial cable must be long enough to reach the antenna on the top of its tower, it stands to reason that a transmitter and studio location at the base of the tower is ideal. If your campus is located on a hill or even a hump, consider the use of the highest building, or rather the highest floor, on the campus for your purpose.