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

704
Radio
Broadcast
gic position in cable and radio communication
between the eastern and western shores of the
Pacific and assumes unexpected importance,
especially for Japan and the United States.
At the Disarmament Conference in Washington,
Japan was granted mandatory powers in
Yap, with the provision that other interested
nations should have equal rights with Japan
in the use of its communication facilities.
Japan now announces her intention to erect
next year a powerful radio station in Yap,
presumably to increase the certainty of her
transpacific communication channels. Undoubtedly
the new station will be used for
relaying. In that role it would be useful also
to the United States when static interferes
with the long spans over which our present
circuit to Japan extends.
Cooperation in Solving Interference
MAJOR WILLIAM N. HENSLEY, JR. A recent issue we had occasion to commend
the activities of Mr. Alfred Caddell
Commanding Officer, Mitchel Field,
New York
INof the American Radio Association and
" The adaptation of radio to the airplane has used as an illustration of the work he was
completely changed the aspect of war. Under
present conditions, an enemy would have no attacking with success the question of interference
in the broadcast channels caused by
secrets, To mass troops at any one point would
simply serve to inform the opposing forces that the steamers of the New England 'Steamship
an offensive was contemplated. Artillery fire
Company, which carried on a heavy commercial
traffic with
could lie directed with such deadly accuracy as
to annihilate any stronghold. The spark transmitters.
gun pointer
would have first hand and almost instantaneous The interference was there without any
information as to the necessary corrections with doubt, and we quite rraturally commended
the result that big guns can be fired with the Mr. Caddell for the lively measures he was
precision of a rifle"
taking to eliminate it. We have received a
very courteous letter from the president of the
Steamship Company asking us to assure the
channel as one through which material for
broadcast listeners that his company was
entertainment rather than education should
anxious to help
be sent. It is not at all impossible that the
in clearing up interference as
much as possible. In accordance with the
educational possibilities of radio have been
recommendations made at the last radio conference
the ship traffic is now being carried on
overestimated. Possibly the contact with
the instructor, the opportunity to ask questions,
to get his criticism and occasional
on a wavelength much farther removed from
the broadcast channels than the
praise, have a much originally interfering
wave of 600 meters, and
higher value in the field of
education than is
generally supposed. The
he hopes the
progress of educational radio must interference nuisance has been done away with.
depend His letter, however, contains one na'ive
upon its reception by the public, and the public's
demand for it may show conclusively, as
statement which we think worth while passing
along. "I get no interference from these
has often been stated, that the teacher, and
steamers," says Mr. Parnell, "although
not the method or material taught,
is the use
I factor
which advances the world's a simple set consisting of three stages of radio
knowledge.
frequency, a detector, and three of audio
frequency,
Yap Gets a Radio Station
seven tubes in all." Well, naturally,
he gets no interference. Three stages
THE small island of Yap in the western of tuned radio frequency will eliminate a whole
Pacific has several times loomed up in lot of interference, but surely this is a rather
international affairs with a valuation expensive equipment to expect the average
much greater than its physical dimensions and broadcast listener within a few miles of New
natural riches warrant. It occupies a strate- York to use. If all the listeners who have