Some Developments in Common Frequency Broadcasting

HE development of chain broadcasting and the congestion in the broadcast frequency range has naturally led to a consideration of the possibilities of operating a group of stations on a single frequency. 1,2 The possible usefulness of such a system has resulted in a number of attempts to secure the additional coverage offered by the simultaneous operation of two or more stations broadcasting the same program on a common frequency. This problem has been attacked in two different ways.