TOO MANY STATIONS

Radio Record, Volume I, Issue 26, 13 January 1928, Page 15

TOO MANY STATIONS

AMERICA 'S DIIF ICULTY.

The crowding of the ether by cbout 600 broadcast stations in the United States is still worrying the Americans. Federal Radio Commissioner Caldwell, speaking at a meeting of the American Institute of Electrical Engineers in New York on October 14, said that there was hope for relief in the broadcast congestion ‘through a method of synchronising a nuniber of transmitters on a single channel. He pointed out that there were three systems for station synchronisation, and. that they promised excellent possibilities. "The first method," said Mr. Cala well, "is wire control for two or more stations from a common source. This: plan offers an economic solution of the very serious problem of chain-pro-gramme operation where twenty to forty channels are sometimes tied up prvith the identical programme," | A Way Oat. The second synchronising metlcd suggested by Mr. Caldwell utilises a receiving set installed ten :niles from the transmitter to he synchronised. On this set the incoming carrier wave from the distant station on the same channel is picked up and sent by telephone wire te the covitrol room, By the zero heat method the local station is synchronised with the distaurt station. The third method is for the broadcasters to use matched piezo cr: stals, maintained under the standard temperature at the two or more rtativns to be synchronised,