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RADIO BROADCAST
obtained and financial commitments made in Brazil. At Warsaw, Poland, the Radio Corporation of America is now erecting a highpower station. One-half of the necessary radio equipment has been forwarded to Poland from the United States, and American engineers are making the installation."
Vacuum Tubes Promised
EVERY effort is being made by the manufacturers to meet the great demand for vacuum tubes — the very "heart of the radio. " The Radio Corporation of America announces that the May production of vacuum tubes, used in radio transmitting and receiving sets, by the companies which it represents, will reach 175,000. The production scheduled for June calls for a total delivery of 200,000.
Crystal detectors formerly served the purposes of the larger number of amateurs, but the present popularity of broadcasting has created the demand for vacuum tubes. Although machines play a part in the major processes of manufacture, tubes are still largely made by
hand. Hand work plays a far more important part in making them than in the making of any other piece of electrical apparatus with which the public is familiar.
The manufacture of the delicate vacuum tubes used as detectors, transmitters, and amplifiers requires the building up of a force of technically trained men to work in the factories. That this is being rapidly done is proved by the fact that during the first eleven months of 1921 the average production of vacuum tubes by these companies was 5,000, in December the production schedule was increased to 40,000, in January to 60,000, and the production in April was expected to reach 150,000.
Russia and Radio
JUST to what extent Soviet Russia is making use of radio for external and internal communication remains to be heard when the truth once comes out of that dark country. At any rate, Russia is certainly exerting every effort to secure every possible