Methods of controlling radio interference

This paper summarizes the recognized methods for reducing at the source man-made radio noises. The effectiveness of the different controlling methods is discussed in the light of efficiency and utility. The use of shunt-type filters and choke coils is so broad that this paper is confined to the more important applications of these controlling devices. Filter methods are so important that specific applications are discussed in detail. The application of these devices to other apparatus is governed by the type, location, and use of the apparatus.