New Television and Radio Services 147 



our commercial broadcasting on a "band" of frequencies 950 

 kilocycles wide from 550,000 to 1,500,000. Each station 

 transmitting sound programs is assigned a fixed frequency 

 somewhere within this band and is given a "side band" on 

 each side of the fixed frequency, which is five thousand cycles 

 wide or a band ten thousand wide in all. Our commercial 

 sound broadcasting allows room for ninety-five such bands 

 each ten kilocycles wide. But what can we do with a tele- 

 vision "band" from four million to six million cycles wide? 

 Our whole sound broadcasting range cannot accommodate 

 one such station! To try to handle television on our com- 

 mercial sound frequencies would have the general effect of 

 trying to drive a ten-ton truck through a cottage door. 



These, then, are the problems and potentialities of the devel- 

 opment of television tomorrow. The potentialities are truly 

 miraculous. The problems are vast; they are the problems of 

 handling the higher-frequency waves. Equipment must be 

 engineered to handle them; coaxial cable must be provided to 

 carry them. But the production of today is solving those prob- 

 lems for us. High-frequency equipment is being designed and 

 built in vast quantities, by mass-production methods. That 

 production and the equipment to continue it will be ready to 

 serve our peacetime needs tomorrow. Therefore the future of 

 television is bright. 



What of F.M. frequency modulation? In two years it has 

 had an astounding growth. Stations broadcasting with fre- 

 quency modulation expanded from one station to forty-five 

 stations, in that length of time. F.M. receivers half a million 

 of them are in use today. And their delighted owners know 

 a beauty and fidelity of reception, and a freedom from static, 

 that A.M. receivers seldom approximate. Here, too, mass pro- 

 duction of equipment engineered to work on the frequencies 

 used in F.M. will be ready to serve us tomorrow. 



