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direction of D. D. Cole, for engi- neering observation of the test transmissions from the Bridgeport station. In addition. RCA has de- veloped an experimental converter which can be attached to present television receivers to make possible reception of these UHF signals. A limited number of the new receivers and of the converters will be placed in specially selected locations in Bridgeport and neighboring areas during the experimental period to evaluate the effects of the radiated signal. Between January :5 and January 15, NBC television engi- neers will make adjustments in the antenna and transmitter. Receivers will be installed within 25 miles of the station, after January 15. The station will broadcast in the fre- quency band between 529 and 535 megacycles, and pictures and sound will be received only on the special receivers. Selection of the Bridgepoi't area as the site of the new station was made for the following reasons: 1. It is on the edge of the New- York television service area and therefore may be typical of possible future "satellites" which might be located in densely populated areas not adequately served by nearby stations located in large metropol- itan centers. 2. Homes in the Bridgeport area are located in rolling or hilly coun- tryside which will provide an oppor- tunity to study the effects of this type of terrain on UHF propagation and reception. Primarily designed to gather technical information on propaga- tion characteristics and reception problems of UHF transmissions, the station has been given the tem- porary call letters of KC2XAK. An antenna gain of 20 is expected to increase the one-kilowatt output of the transmitter to 20 kilowatts of effective radiated power. Future tests will determine whether the radiating system performs as ex- pected. The transmitter is housed in a residential-type Cape Cod cottage on the outskirts of the city—in Stratford, Conn. It is on Success Hill, one of five hills overlooking Bridgeport. Ap|)lication for a construction permit for the station was filed with the FCC February 8, 1949 and was granted to NBC May 4, 1949. Con- struction of the building was com- pleted November 15, 1949. Erection of the tower, a four- cornered self-supporting structure 210 feet high, was started on Nov- ember 17 and completed one week later. The antenna itself, received December 19 and installed atop the tower December 21, projects 40 feet above the top of the tower. .According to the program of tests, which will last for anywhere from 6 to 12 months, observations of the service will be made in homes with- in the area where service might be THIS 210-FOOT TOWER SUPPORTS THE ANTENNA I.\ NBC's UHF EXPERIMENTS. TRA NSMITTER CONTROL ROO.M OF STATION KC2XAK, WHICH COMMENCED FIELD TESTS ON JA.NUARY 2. obtained, at distances and under conditions which will determine the extent to which such a station can provide service. It is proposed to test various types of receiving an- tennas, investigate shadow areas and multipath problems, to make field intensity measurements, and observations of tropospheric trans- mission. Some of these measure- ments will be made at represent- ative receiver locations. The project also will include measurements with mobile equipment on radials, the in- vestigation of field intensity versus antenna height under various con- ditions and other factors contrib- uting to UHF propagation and re- ception. The detailed work will be super- vised by Raymond F. Guy, NBC radio and allocations engineer. [RADIO AGE 23]