List of Marconi wireless stations

A list of early wireless telegraphy radio stations of the Marconi Wireless Telegraph Co. Guglielmo Marconi developed the first practical radio transmitters and receivers between 1895 and 1901. His company, the Marconi Wireless Telegraph Co, started in 1897, dominated the early radio industry. During the first two decades of the 20th century the Marconi Co. built the first radiotelegraphy communication stations, which were used to communicate with ships at sea and exchange commercial telegram traffic with other countries using Morse code. Many of these have since been preserved as historic places.

The first radio transmitters could not transmit audio (sound) like modern AM and FM transmitters, and instead transmitted information by radiotelegraphy; the transmitter was turned on and off rapidly using a switch called a telegraph key, creating different length pulses of radio waves ("dots" and "dashes") which spelled out text messages in Morse code. Marconi used several types of station:

Coastal stations communicated with wireless stations on ships, providing navigation and weather information and relayed communications from ships to other coastal stations and through telegraph systems. Ships were allowed to communicate on three frequencies: 500, 660, and 1000 kHz.

Transoceanic wireless telegraph stations were large high powered stations with huge antenna structures, with output power of 100 kW to one megawatt. Industrial countries built worldwide networks of these stations to exchange telegram traffic with other nations at intercontinental distances and communicate with a country's overseas colonies. To achieve daylight communication at such long ranges they used frequencies in the very low frequency (VLF) band, from 50 to as low as 15 – 20 kHz. They transmitted Morse code at high speed, 100 - 200 words per minute, using automated paper tape readers.

In 1906, Marconi constructed an experimental station at Queenscliff, Victoria, successfully communicating between Mainland Australia and Devonport, Tasmania. This station operated on a temporary basis; subsequent Australian wireless efforts would be undertaken by Amalgamated Wireless Australasia, established in 1913 under ownership of Marconi, its commercial arch-rival Telefunken and Australian local business interests.

The Marconi Company has owned or operated Canadian coastal radio stations since 1902, either as transatlantic radiotelegraph links or as marine radio stations. While eastern Canada's ship-to-shore coastal stations were government-owned after 1915, the Marconi Company had been paid to continue to operate the facilities. Canada's west coast had been served by government-operated stations since 1907; many stations in the Canadian Arctic were military operations.

The Canadian Marconi Company operated manufacturing facilities at Montreal, Quebec and in 1919 had established on an experimental basis the first commercial broadcast radio station, XWA. This operation would become CFCF (AM/FM/TV) and CFCX (shortwave); Marconi would be forced to sell the stations due to foreign-ownership restrictions imposed on Canadian broadcast stations in 1970. The manufacturing operations have now become Ultra Electronics TCS for tactical radio systems and Esterline CMC Electronics for avionic systems.

Since 1954, the federal Department of Transport has operated former Marconi coastal stations in eastern Canada; most served the Great Lakes and the Atlantic coast: