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CW1GM Uruguay flag Uruguay

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Special call sign of Radiogrupo Sur used in the International Marconi Day event, since 2006.


CW1GM Web site: cw1gm.cx.uy

RGS Web site: radiogruposur.org


In 1908, the Marconi Telegraph Company completed construction of a wireless radio station at Punta del Este, Uruguay. With a broadcast range of 500 km, the station used a wavelength of 600 meters to communicate with ships and a 1700-meter wavelength to communicate with Bern, Switzerland. The station's call sign was MMO.

On September 24, 1910, Marconi arrived in Buenos Aires, Argentina. Throughout the trip across the Atlantic he conducted experiments with kites as antennas in order to receive signals from Clifden, Ireland. After arriving in Argentina, Marconi continued to experiment with kite aerials, and on September 30 he received signals from more than 9500 km away,  almost doubling the distance of the first transatlantic transmission.

The Earth could now be united at great distances by radiotelegraph waves. The station, which had been constructed at Bernal, Quilmes in Buenos Aires province, was later destroyed by fire in its facilities in June, 1911. 

In the summer of 1910-1911, Marconi visited Punta del Este; the area where he lived is still called “Barrio Marconi” in his honor.

It has not been documented how Marconi arrived in Punta del Este, nor by what means; but it is probable that he traveled by boat directly from Buenos Aires to the peninsula.

Later, the Punta del Este station was closed and Buenos Aires was chosen for the communications of the "via Marconi" network. In 1925, a telegram could be sent practically to any part of the Western world using the shortwave stations of this network.

Text extracted from the brochure "Guglielmo Marconi, 1895-1995, One Hundred Years of Radio Communication" (Instituto Italiano de Cultura, 1995).

Nowadays, there is a monolith that remembers its house on the Punta del Este coastline, with several reminder plaques attached to it from several cultural institutions:

On the 100th anniversary of his visit, we showed this street banner:

In a rough translation the text reads: " From the times of the galena detector crystal set, through the vacuum tube, and to the WiFi of today".



Please, ONLY Direct QSL to:


            QSL Manager: CX2ABC [Web Site]



P. O. Box 950




            Please, include IRC (or 2 USD) + SASE


            For safety you can use PayPal (minimun 3 USD contibution). In this case we also expect you QSL card. We don't sell QSL cards, we exchage them.


            We do not receive or send cards using the Bureau.


            We are not interested in (and so, we don't reply to them) any type of electronic QSL confirmation.




8657740 Last modified: 2018-02-17 20:27:47, 6383 bytes

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