Heinl radio business letter (July-Dec 1931)

SELF-POWERED RADIO ANNOUNCED Announcement of the development of a self-powered radio receiver for unelectrified areas and districts served by direct current, comparable in performance to a modern electric powered receiver, was made today by E. A Nicholas, General Sales Manager of the RCA Victor Company, at Camden, N. J. The development of the new receiver was made possible by the introduction of the new so-called air cell battery which literally breathes its oxygen from the air and gives approximately a year of continuous service, A low-drain 2-volt tube has also been developed for use in conjunction with the new battery* According to Mr. Nicholas, RCA Victor engineers at radio headquarters, in Camden, have also made two important contributions toward the solution of the battery set problem with the development of a remarkable new circuit which provides four times the audio output of an ordinary circuit using the same tubes and batteries, and the development of a fixed-magnet dynamic loudspeaker which provides a quality of tone and range of volume never before possible in a battery-operated receiver. X X X X X X CBS NOW IN THIRTY-EIGHT STATES Thirty-eight of the forty-eight States now have outlet stations for the programs of the Columbia Broadcasting System, according to announcement from CBS headquarters. In the East, the only States not possessing a Columbia station as yet are New Hampshire, Vermont and Delaware. West of the Mississippi River, States without a Columbia representation are North Dakota, Wyoming, Montana, Idaho, New Mexico and Arizona. Only one commonwealth in the entire South is missing in the setup of the network Mississippi. "Columbia, with its 85 stations, thus not only is the largest network, but has the most widespread geographical representa¬ tion", the statement declares* X X X X X X 3