Radio Broadcast - 1925, February - 113 Pages ... - VacuumTubeEra

The March of Radio 699
PROMINENT FIGURES IN THE RADIO WORLD
In the group, from left to right are, Prof. Alfred N. Goldsmith, past president, Institute of Radio Engineers,
and chief broadcast engineer, Radio Corporation of America, John V. L. Hogan, consulting radio engineer,
Prof. J. H. Morecroft of Columbia University, another past president of the Institute of Radio Engineers.
Philip Torchio, L. \V. Chubb, and Prof. L. A. Hazeltine, Stevens Institute of Technology to whom the
patent on the neutrodyne" receiver was granted
of these schemes that the sending and receiving
drums run in exact synchronism, and to do this
when 3,000 miles of ocean separate the two, is
quite evidently a real task. Undoubtedly we
shall later get a better explanation of the new
features of the Radio Corporation's scheme,
which shall show how the requisite synchronism
of sender and receiver is maintained in
the radio channel.
A
REPORT
The Radio Compass Can Guide
Aeroplanes
from Washington, evidently
emanating from the Army Air Service,
tells of "the first practical test" of the
radio compass as an aeroplane guide. We
were under the impression that the radio
compass was quite successfully used during
the War to guide aeroplanes, but now it
appears
that some new developments make
the Signal Corps rise and assert that a real
advance has been made. Two special radio
compass stations have been established, one
at Dayton, Ohio, and the other at Moundsville,
West Virginia. By means of the signal
sent out from these stations, Lieutenant G. W.
(ioddard was able to "keep in a bee-line,"
as he says, between the two fields even though
the day was so foggy that he could not get his
bearings from well-known landmarks.
The transmission system was such that
when he was on a straight course he heard
only dashes in signalling, but when he got off
the course the signal was changed. If his
plane was veering to the left he heard a dash
and dot repeated at ten-second intervals, but
if he was going to the right of the proper course
he heard a dot and a dash repeated at the same
interval. By thus correcting the direction
of his flight until he heard dashes only he knew
that he was directly in line with the station
toward which he was trying to fly.
One who has not been up in an aeroplane
cannot appreciate the difficulty of getting
radio signals in the cockpit. Many times we