Radio coordination

THE AUTHORS´ experience with radio-interference problems in northern and central California is used as a basis for this paper. An attempt has been made to present the various phases of the problem rather than to offer a solution of any particular phase. Radio interference from natural static and from radio sources is not within the scope of this paper, but is mentioned where it has a bearing upon interference caused by electrical sources. Natural static is less severe in the West than in the East, making other types of radio interference more apparent. A larger network of higher voltage transmission lines also has been built up in the West because of the extensive hydroelectric developments and a more scattered population, and this factor also enters the problem to some extent.