Omaha daily bee., 1919-03-16
WIRELESS PHONE
TO REACH 10000
MILES IN 1878
New Yorker Soon to Be Able
to Converse by Wireless
With New ZeaIander,
Expert Says.

New York, March 1s.-(Special)
Radio telephone conversations
with the human voice for distance
of 1900 miles, thus extending the
present wireless phone distance rec
ord by 5000 miles at one leap, is the
prediction of radio advance for the
year 1919 made by DIR. Lee de- For
rest, inventor Of the three-electrode
vacuum tube, otherwise known as
the audion, the principal agent which
since the first wireless work by
marconi has made possible the pro-
lection of the human voice through
space over the long distance tele-
phone line alld also through Hertz
zian waves.
Once, again American engineering
genius experimenting with the aud
ion, in connection with another
American invention, the Alexander
son generator, takes the lead in radio
progress, according 20 DR.. de For
est, who in making announcement
Of the new record at hand, says:
1T may be of interest to the lay
public as we'll as to those scientific
ally inclined, to know that as a re-
suit of American engineering ability
the world is about to see another
distinct advance in the rapid pro-
gress of radio engineering. Whenthis
feat is accomplished it should be
welcomed with great pride by all
Americans, who should know in adj
vance that it will be the result of
purely American brains and inven-
ton
Advance in Radio Communication.
The proposed advance in radio
communication to whichNI am refer
ring, is, in my judgment, already
assured for the year 1919 as a re-
suit of the experiments conducted
by DR.. Alexanderson, of the General
Electric, company, an American en-
gineer, to whom credit should be
given. DR.. Alexanderson has been
the worlds pioneer in the consruc-
ton of high frequency alternators
generating alternating currents
which can be directly applied to the
antenna and radiated for wireless
signalling. His latest creation is a
800 kilowatt generator which pro-
duees alternating current of approx
imately $4,000 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 q British
owned wireless concern, was, as all
radio engineers predicted, 4 CONF
plete failure, and they were COM
PEELED to call upon an American
engineer to save the situation.
"Dr. Alexanderson can now put
$50 amperes or 80 kilowatt high FREE
qucncy energy in this huge antenna
and has under certain tests raised
this as high as $50 amperes. All
this energy is controlled by special
magnetic control devices which
he has : invented, and this, in
turn, can be controlled by
bank of high power audion ampli-
fiers ranged in pyramid connection,
so that an ordinary microphone con-
trolling the first audion amplitier
which in turn, CONTROLS q larger
number, is able, through the magnet
control to modulate in perfect con-
formity with speech waves, the en-
tire so kilowatts in the antenna.
Half Way Around World.
This means that in q short time
we can expect a voice spoken in the
transmitter in New Jersey to be
heard half way around the world.
Here, also, will be another evidence
of the astonishing utility Of the aud
ion, first as>an ampliher to modulate
or control practically unlimited
amounts of energy at the transmit
tiers; second to receive and detect
the inhnitesimal energy received
half wav around the globe; third, to