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i] Portable walkie-lookie unit is dwarfed by a huge para- bolic receiving unit used to pick up microwave signals from walkie-talkies on the auditorium floor. Television and radio booths are located high above the speaker's platform enabling observers to watch action in oil parts of the Amphitheatre. Plans developed by NBC called for the installation, solely for this purpose, of 52,000,000 of equipment. Included were one hundred miles of wiring and ten tons of audio or voice apparatus, augmented by 28 electronic cameras, 12 film cameras and numerous tape recorders. Each Delegation has Microphone Although all networks utilized the facilities, NBC engineers installed and operated the 55 microphones and loudspeaker system which connected the speakers plat- form and all state delegations seated on the floor of the Amphitheatre. From a common control point directly beneath the rostrum, the microphone-speaker circuits could also be connected directly with newsreel headquarters and other loudspeaker outlets both inside and outside the audi- torium. To simplify communications with its extensive per- sonnel stationed at widespread locations in the Conven- tion city, NBC compiled its own telephone directory and in addition, arranged a special 24-hour teletype system connecting the Amphitheatre with all affiliated stations on radio and TV networks. As working space for its contingent at the Amphi- theatre, NBC constructed three TV studios, five radio studios, and an assortment of rooms for offices and as storage space for the large stock of spare parts, test instruments and general supplies. Telecasts originated by NBC at the Republican Con- vention were broadcast in 47 key market areas through- out the nation, surpassing all other network coverage by more than 35 per cent. Based on the 17,800,000 television sets presently in use, it is estimated that 70,000.000 viewers were in range of the convention scenes transmitted by WNBT and affiliated NBC sta- tions. When television covered the 1948 conventions in Philadelphia, distribution of the featured programs was limited to 5.000,000 persons along the Eastern seaboard. At that time, stations beyond this area were forced to rely on kinescope recordings of the proceedings. In addition to the thorough coverage of the sched- uled sessions of the Republican Convention, NBC also originated numerous regular TV and radio programs from Chicago. Among them were "Camel News Cara- van": "Meet the Press": "We the People": "American Forum of the Air": "Youth Wants To Know": "News of the World": "Three Star Extra" and "H. V. K.ilten- born and the News". All facilities used during the G.O.P. assembly were duplicated for the Democratic conclave which opened July 21. in Chicago. 4 RADIO AGE