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The Roaring Twenties

Brief chronology:
In November, takes place the world's first scheduled time and schedule broadcast by a commercial organization. The KDKA station broadcasts the presidential election of Warren Harding, from Pennsylvania.
First short-wave transmission tests, between North America and England.

The Roaring Twenties


The first licenses to establish broadcasting stations in North America are granted.

In July, RCA makes the first broadcast of a sporting event, the Dempsey-Carpentier boxing fight.


The Portuguese government grants the English company Marconi the operation of radio communication stations (the company gets the monopoly on international radio but, in return, is charged with the task of creating a Portuguese company to operate wireless telegraphy in the national territory).

On 2 June, Madeira Island TSF post is inaugurated, installed in the building of the Funchal telegraph station.

On 6 October, the French Radioelectric Society's “Radiola” station is inaugurated in France, the first to include music programs in addition to information.

Creation of the BBC (October 18), the British Broadcasting Company, renamed British Broadcasting Corporation in 1927.


Creation of ORSEC (by António and Francisco Borges / Porto).

In September is founded in Lisbon, by José Celestino Soares, the first Portuguese scientific association of T.S.F amateurs, the "Radio Academy of Portugal".

On November 27, amateur radio enthusiasts from Hartford, Connecticut, and Nice, France, transmit the first two-way transatlantic messages at a wavelength of 100 meters.


Abílio Nunes dos Santos Júnior, considered the father of broadcasting in Portugal, begins the experimental transmission of music and word, from his radio station installed in the building of the “Great Warehouses of Chiado”, property of his father and uncle and which, under The designation of P1AA - Rádio Lisboa, is heard throughout the city and surroundings.

The first issue of the magazine “TSF em Portugal” is published. Creation of the Portuguese T.S.F Amateur Society  (extinct in 1925).


Abilio Nunes dos Santos begins regular broadcasting, already with the appointment of CT1AA - Radio Portugal, this time with installations on “António Augusto de Aguiar” avenue.

Creation of Rádio Condes (by Arnaldo Abreu / Lisboa); Ideal Radio (by Júlio Silva / Porto); Radio Porto (by António Rodrigues / Porto); CT1DH (from Raul Sales / Lisbon).


Creation of the Network of Portuguese Radio Broadcasters, preside by Eugénio de Avilez.


Creation of CT1CZ- Radio Coimbra.

First World Broadcasting Conference, which reviews and defines the frequencies to be allocated to the existing radio services , at the time (fixed, maritime and aeronautical mobile, broadcasting, amateur and experimental).


Creation of CT1DY (that gave rise to Radio Clube Português in 1931 / Botelho Moniz / Parede), Radio Hertziana CT1BO (by Abílio Cunha / Lisbon).


Creation of Radio Sonora in Lisbon (by Francisco Lacombe Neves), and Radio Motorola (by Amadeu and Fernando Laranjeira / Lisbon).


Creation of Radio Sonora in Porto (by Agostinho Antero and José Alberto Calheiros Lobo).

The government creates the Board of Radioelectric Services (Edict Nº 17.899, of 29 January 1930), under the supervision of CTT, authorizes the acquisition of a Medium Wave and Shortwave transmitter, and launches the idea of a public broadcasting station with a service tax. The diploma declares "state monopoly of all radiotelephony, broadcasting and other services that may be discovered and related to radioelectricity".

First worldwide radio broadcast from Schenectady, New York.