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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 finished the set up of a wireless radio station at Punta del Este, Uruguayan department of Maldonado. It had a coverage radius of 500 km and used a wavelength of 600 meters in order to communicate with ships and also 1700 meter wavelength to communicate with Bern, Switzerland. The station's callsign was MMO.

On September 24th, 1910, Marconi arrived in Buenos Aires, Argentina. During the whole trip he had conducted experiments with kites as antennas to receive signals from Clifden, Ireland. Later conducted more experiments with kite aerials, and on September 30th he received those signals from more than 9500 km away.

Thus, he managed to almost double the distance of the first transatlantic transmission. The Earth could be united at great distances by radiotelegraph waves. The station had been constructed at  Bernal, Quilmes in Buenos Aires province , which was later destroyed by  fire in its facilities in June, 1911.

There are oral testimonies of the voyage of Marconi to Punta del Este, in a quarter called "Barrio Marconi"  which occurred in the summer months of 1910-1911.

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.




8640210 Last modified: 2018-02-10 19:58:37, 6641 bytes

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