"Radiolympia"

Abstract

THE sixteenth national radio exhibition at Olympia, London, new generally known as “Radiolympia", was opened on September 28 by Mr. Herbert Morrision Lord President of the Council. The exhibiton which remained open until October 8, was organised by the, Radio Industry Council, and seaved primarily to show the present state of development and manufacture of broadcasting sets and sets and television receivers. The range and variety of receivers now available reflects the advanced and stable position of the television service of the B.B.C., and shows that the industry is ready to meet the demand that will be created in the Midlands when the Button Coldfleld transmitting station is opened next December. Direct-viewing receivers with cathode-ray tubes ranging in size from nine to fifteen inches in diameter are the most popular type, but several firms displayed models of the projection type giving a larger picture on a flat screen. While, as has been announced officially, the present standards for transmitting black-and-white pictures will remain in Great Britain for several years, an interesting demonstration of transmitting and receiving pictures in colour was given by one firm. The method comprises the use of synchronized, rotating colour filters in both camera and receiver giving fifty pictures per second in the three primary colours successively. Although it may be many years before colour television broadcasting becomes a feasible proposition, it is possible that such a system as that shown would have some application on a closed-circuit network for educational, medical or industrial purposes. A feature of particular interest to the visitor interested in television was the installation in Olympia of a complete television theatre. This structure included a stage 90 ft. by 45 ft., probably the largest television stage in the -world; and the theatre was used daily during the exhibition for the provision of the normal B.B.C. television service programme.