Design and Installation of Limited-Area AM Broadcast Systems

This paper discusses the design and installation of low-power AM broadcast systems using power-line-carrier techniques. Such systems permit coverage of listeners in dormitories and similar structures. This discussion covers technical aspects of the propagation medium, typical design objectives, and related economic considerations. Spectrum-regulation issues pertaining to North America are covered, with related matters like selection of operating frequency and control of undesired radiation. By supplementing the rather meager technical literature on this topic, this discussion may prove useful to the broadcast engineer who is called upon to design or expand one of these systems.