The Republican. [volume] (Oakland, Md.) 1877-current, 1941-03-20
RIDDER'S RADIO&ELECTRIC
COMPANY
IMPORTANT CHANGE IN RADIO
BROADCASTING
Specialists in Communication

After March go, 1871, many radio
listeners will notice less 'sGueals"
and ''growls" coming from their radio
sets, according to information received
this morning from Riders Radio and
Electric Company.
Much of this radio interference is
caused by broadcasting stations To-
Gated in North American countries
outside of the United States in which
the United States has had no agree
ment relating to broadcasting.
The shift is frequency of some
broadcasting stations on March 20 is
designed to minimize that part Of
this troublesome interference in broad
cast reception which is caused by sta
lions in other countries adjacent to
the United States.
Several attempts were made to Sc
cure an international agreement on
this problem. However, it was not
until March Is, 1897, at a conference
in Havana that Government radio en-
gineers from Canada, Cuba, Haiti,
Mexico, Santo Domingo and the
United States could agree even upon
basis of discussion. At the first meet
ing at Havana it was decided that the
only practical solution was for all
North American nations to adopt iden-
teal engineering principles with re-
ingly in November, 1887, each gov
eminent sent technical representatives
again to Havana, Cuba, to negotiate
North American broadcast treaty
This was successfully accomplished
just before Christmas of 1887. All Of
the signatory nations ratified the
treaty before March 20, 1910.
Pursuant to this treaty the repre-
sentative technical radio experts from
each of the North American nations
met recently in Washington. They
spent nearly three weeks of work IN
ironing out the many details of dove
failing frequency assignments for 1890
existing stations in North America,
so that this vast number of stations
might operate simultaneously with
the minimum of Objectionable inter
ference.
In order to solve such a complex
technical puzzle it was necessary to
shift the frequency assignment of
many existing stations. Otherwise
those stations which previously had
been Glowing each other out of the
air" would continue interfering with
one another.
North American Governments will
take the initial steps to put the treaty
into full effect by changing the fire.
quency assignments of stations in
each of the North American nations
to conform to the orderly plan of allo-
cation which has been agreed upon.
In making this change, no doubt a
few OF our favorite programs may be
missed unless we understand just what
has happened and where to look for
particular station on the dial.
1t should be understood that this
change in frequencies is not radical
one but slight shift, in most cases
to slightly higher frequency, as the
broadcast band has been heightened
to 1900 kilocycles instead of 300 as
heretofore. Not all broadcasting sta
lions will be affected by the change.
Mr.. Ridder, Of Riders Radio &
Electric Company, advises that a list
of the broadcasting stations, and their
allotted position on the dial, which
will be affected by the frequency
change, will be available at his store
and will be given to all persons re-
questing a copy.
1t should be understood that all
improvements desired cannot be ac-
complished on March 20. This is the
first engineering step of many which
are designed to improve radio recep-
ton in North America. However, ra-
dio moving day is the only step now
contemplated which requires the di-
rect cooperation of the public. This
initial step lays the foundation not
only for an immediate improvement
but also for the future benefits made
possible by modern radio engineering
development.
Advertisement 1t