12,000-MILE WIRELESS TELEPHONY

Dominion, Volume 12, Issue 190, 7 May 1919, Page 7

12,000-MILE WIRELESS TELEPHONY

NEW ZEALAND TO LISTEN TO LONDON CONCERTS. Dr. Lee Do Forrest, the noted wireless telephone expert and inventor, has predicted that in the summer, of 1919 it will be possible for the human voice 6poken into tlio transmitter of the . radio-tele-phone to bo heard 12,000.-miles . away, or nearly half-way round the world. The feat would extend the present wireless telephone distance GOOO miles at one leap. "This advance in the progress of radio engineering; (lie says) is assured through the experiments of Dr. Alexanderson, of tlio General Electric Company, who has been the world pioneer in tlio construction of high frequency alternator; and in generating alternating currents which • can be applied to'.- antcnae and radiated' from wireless signalling. His latest product is a current bf ; approximately 15,000 metres wave • length.-" It was further explained by Dr. Do Forrest that all\ this energy can be controlled so as to bo modulated in perfect conformity with speech waves, and be transmitted half-way around the world. Ho said also that the use of the audion makes possible the., amplification oi sound-received to any desired degree, so as to be heard throughout a large auditorium. Music-lovers in New Zealand, for instance, will !>o able to hear, concerts by artists in New York, Paris, and London as plainly and distinctly as persons attending the actual renditions.

1 The Liverpool Tramways' Committee have prepared a scheme tp spend .£550,. • 000 on new generating plant, elecfcttt ■ : mains.'cars, and motor omnibussj.