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May 7 is International Radio Day

Photo: Library

On May 7, 1895, Russian physicist Alexander Popov showed for the first time to the Russian Physical Society in St. Petersburg his apparatus for transmitting and receiving electrical oscillations from distances without a wire. In 1899, Popov connected to the device a telephone receiver for audio reception of the signal.

Under a contract between the Bulgarian and Russian governments in 1907, the first Bulgarian wireless telegraph began operating near Varna. In 1911, a second radio station was launched on the cruiser Nadezhda. 
The Neuilly Treaty of 1919 allowed the country to have only 2 radio stations under international control. On the Italian side, the sanction was signed by the inventor Guglielmo Marconi. 
By law after 1927, radio in Bulgaria became the main means of telecommunications.

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