New unit-type multifrequency 5 kW transmitting equipment

Describes the design of a sectionalized transmitting equipment in which the process of switching to new frequencies is much simplified and which is so devised that sections for other frequencies may be added readily. As a result, the operation is simpler and more reliable, several frequencies may be employed simultaneously, and the cost of the equipment is reduced. Many of these sets are in use in the U.S.A.