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Helnl Radio News Service
7/10/46
NEW VACUUM TUBE AMPLIFIES RADIO SIGNALS 10,000 TIMES
A new vacuum tube has just been devised by the Bell Tele¬ phone Laboratories in New York. Dr. John R. Pierce and Dr. L. M. Field being connected with it, it is expected to revolutionize veiy high frequency nationwide communication.
The new device is said to make possible a "wave-guide" network of coast-to-coast proportions over which 10,000 telephone conversations may go simultaneously, or all the television programs needed for all the television stations likely to be operating in this country in years to come.
A wave-guide is a hollow metal tube through which "radio" waves may move like water. Wave-guides came into their own during the war, when no high-power radar could get along without them.
The principle now is being applied to communication purposes.
A wave-guide system set up to transmit and receive dots and dashes of the Morse code instead of telephone speech or tele¬ vision images would carry easily the equivalent of one hundred million words in dots and dashes each minute, it was said. An ordinary radio channel on the average wo ridwide frequencies cai>* ries only a few hundreds of words a minute.
The new tube has been expanded in other ways besides that of channel width. In the laboratory it has been able to "amplify" a signal millions of cycles wide so effectively as to produce what engineers call "a power gain of 10,000 times". When doing this, the tube operates over a band 800 megacycles wide, and does it "1,000 times better" than the best other tubes of con¬ ventional design.
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ASHBY, NBC, AGAIN HEADS N.Y. LAWYERS COMMUNICATIONS GROUP
A. L. Ashby, Vice-President and General Counsel of the National Broadcasting Company, has again been appointed Chairman of the Communications Committee of the New York County Lawyers* Association. Judge Ashby has headed this important committee for many years.
Among others named to serve on the Communications Commit¬ tee during 1946-47 by Joesph M. Proskauer, President of the Association, are: Robert D, Swezey, Vice-President and General Manager of the Mutual Broadcasting System; Joseph H. Ream, VicePresident and Secretary of the Columbia Broadcasting System; Ralph F. Colin, General Counsel, CBS; B. M. Webster, former General Counsel of the Federal Communications Commission; Wolcott H, Pitkin, Vice-President and general attorney, and John F. Gibbons of the International Telephone and Telegraph Corp. ; Richard B. Scandrett , Jr. and Leslie J. Tompkins, Professor of Law at New York University.
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