A pole-mounted A-C-operated repeater for 12-channel open-wire carrier systems

POLE-mounted a-c-operated carrier repeaters have been available since 1952. These repeaters are for use on 4-channel groups and are of the “frequency-frogging” type.1 When a 12-channel open-wire carrier system using miniature components for both terminals and repeaters became available, it was felt that it might be practical and economical to adapt the repeater to a pole-mounted installation, operated on a-c, with battery stand-by.