Studies of telephone line wire spacing problems

By spacing a wire and its mate closer than has been the usual custom, and thus obtaining a greater separation between pairs on open wire telephone lines, inductive interference can be diminished and higher carrier frequencies transmitted, thus increasing the message carrying capacity. The hazard of the wires swinging into contact in the wind is controlling in the selection of a minimum spacing. This article gives the results of studies made to determine the effect of natural winds on variously spaced and arranged wires suspended in accordance with telephone practice.