Effect of radio frequencies of a power system on radio-receiving systems

IN the last few years considerable work has been done, in this country by the Joint Co-ordination Committee on Radio Reception of Edison Electric Institute, National Electrical Manufacturers´ Association, and Radio Manufacturers´ Association, and in Canada by the Department of Transport, to develop radio-noise measuring circuits and instruments.^1,2 The methods² of measuring radio noise and the instruments have reached the point in their development where the data obtained with these standard instruments can be correlated and the radio-influence characteristics of electric apparatus and power systems can be determined.