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  2. Radio - Wikipedia

    en.wikipedia.org/wiki/Radio

    An antenna farm hosting various radio antennas on Sandia Peak near Albuquerque, New Mexico, US. Radio is the technology of communicating using radio waves. [1] [2] [3] Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an ...

  3. Radio 10 (Argentina) - Wikipedia

    en.wikipedia.org/wiki/Radio_10_(Argentina)

    radio10.com.ar. Radio 10 is an Argentine talk radio. It broadcasts from Buenos Aires on the 710 kHz with an effective radio power of 100 kW. It has affiliates in the country. It is owned by the businessman and journalist Daniel Hadad .

  4. Letter beacon - Wikipedia

    en.wikipedia.org/wiki/Letter_beacon

    Letter beacons are radio transmissions of uncertain origin and unknown purpose, consisting of only a single repeating Morse code letter. They have been classified into a number of groups according to transmission code and frequency , and it is supposed that the source for most of them is Russia and began during the Soviet Union .

  5. Prosigns for Morse code - Wikipedia

    en.wikipedia.org/wiki/Prosigns_for_Morse_code

    Prosigns for Morse code. Diagram of a telegraph key used to send messages in Morse code. Procedural signs or prosigns are shorthand signals used in Morse code telegraphy, for the purpose of simplifying and standardizing procedural protocols for landline and radio communication. The procedural signs are distinct from conventional Morse code ...

  6. Radio wave - Wikipedia

    en.wikipedia.org/wiki/Radio_wave

    Air is thin enough that in the Earth's atmosphere radio waves travel very close to the speed of light. The wavelength is the distance from one peak (crest) of the wave's electric field to the next, and is inversely proportional to the frequency of the wave. The relation of frequency and wavelength in a radio wave traveling in vacuum or air is.

  7. ACP 131 - Wikipedia

    en.wikipedia.org/wiki/ACP_131

    ACP 131. ACP-131 [1] is the controlling publication for the listing of Q codes and Z codes. It is published and revised from time to time by the Combined Communications Electronics Board (CCEB) countries: Australia, New Zealand, Canada, United Kingdom, and United States. When the meanings of the codes contained in ACP-131 are translated into ...

  8. Modulated continuous wave - Wikipedia

    en.wikipedia.org/wiki/Modulated_continuous_wave

    v. t. e. Modulated continuous wave (MCW) is Morse code telegraphy transmitted using an audio tone to modulate a carrier wave . Continuous wave (CW), by contrast, does not use a subcarrier, so there is no emission at all between Morse code symbols. MCW can be generated by any AM or FM radio transmitter with audio input from an audio oscillator ...

  9. List of radio stations in Malaysia - Wikipedia

    en.wikipedia.org/wiki/List_of_radio_stations_in...

    The radio station also can be heard in Kedah and Perlis. Capital FM: 88.9 MHz: STAR Rfm Sdn.Bhd (Star Radio Group, The Star) English Malay: Music: Klang Valley and Penang: Capital FM ceased transmission in October 2015, and it has since been sold to Astro Radio by Star Radio Group and then became a Chinese-language radio station "goXuan FM (now ...