The Bridgeport times and evening farmer., 1919-02-10
HAVE RADIO PHONE:
 OF 1,2OO MILES

It will be possible during 1919 for the human voice, spoken into a trans hitter of a radio telephone, say in New Jersey, to be heard 12,000 miles away, or nearly half way round the world, according to the prediction of Dr. Lee de Forest, made public yes- terday by the De Forest Laboratories at High Bridge. This feat would ex- tend the present wireless telephone distance by 6,00O miles at one leap.
 Dr. De Forest is the inventor of the three elecrode vacuum tube, otherwise known as the audion, the principal agent which since the first wireless work by Marconi has made possible the distance telephone line and also through Hertzian waves.
 Tt may be of interest to the lay public as we'll as to those scieptifical- ly iGclined," Dr. De Forest said, Ito know that as a result of American engineering ability the world is about to see another distinct advance in the rapid progress of radio engineering.
 'The proposed advance in radio communication, in my judgment is already assured for the year 1919 as result of the experiments conduct ed by Dr. Alexanderson of the Gen eral Electric Company. an American engineer. Dr. Alexanderson has been the worlds pioneer in the con- struction of high frequency alterna- tors generating alternating current which can be directly applied to the antenna and radiated for wireless signalling.
 His latest creation is a 200 kilo- watt generator which produces alter hating current of approximately 15,- 900 meters wave length, which has been for several months in operation at the big navy control station at New Brunswick The former large spark set, which was installed at this station by a British owned wireless concern, was, as all radio engineers predicted, a complete failure and they were compelled to call upon an American engineer to save the situa- ton.
 "Dr. Alexanderson can now put 45O amperes or 80 kilowatt high fre- quency energy in this huge antenna and has under certain tests raised this as high as $50 amperes. All this energy is controlled by special mag netic control device which he has in vented, and this in turn can be con- trolled by a bank of high power au- dion amplifiers ranged in pyramid connection, so that an ordinary mil crophone controlling the first audion emplifier which in turn controls a larger number is able through the magnetic control to modulate in per- feet conformity with speech waves the entire 80 kilowatts in the antenna.
 This means that in a short time we can expect a voice spoken in the transmitter in New Jersey to be heard half way round the world. Here also will be another evidence of the astonishing utility of the audion, first as an emplifier to modulate or con- trol practically unlimited amounts of energy at the transmitter; second, to receive and detect the infinitesimal energy received half way round the globe; third, to amplify this received energy to any degree desired so that it can be heard throughout a large auditorium, if this be desired.
 '"The possibilities of this radio ad- vance can at once be readily imagin- ed. It means in effect that by tele- phone communication without wires the human voice will be heard just as plainly between New York and New Zealand as between New York and Brooklyn. It means that the music lovers of New Zealand or any other country equally distant will be able to enjoy the pleasures of vocal or in strumental concerts given in New York or any part of the world"