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  2. The Conet Project - Wikipedia

    en.wikipedia.org/wiki/The_Conet_Project

    The Conet Project was rereleased in a five-disc 15th anniversary edition in April 2013 with a new booklet, featuring detailed photographs of a numbers station voice sample controller, a Sprach-Morse-Generator der HVA des MfS (Hauptverwaltung Aufklärung des Ministeriums für Staatssicherheit der DDR) and one-time pad samples of the type used by ...

  3. Morse code - Wikipedia

    en.wikipedia.org/wiki/Morse_code

    Morse code is a telecommunications method which encodes text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs. [ 3 ][ 4 ] Morse code is named after Samuel Morse, one of the early developers of the system adopted for electrical telegraphy.

  4. Beat frequency oscillator - Wikipedia

    en.wikipedia.org/wiki/Beat_frequency_oscillator

    Beat frequency oscillator. In a radio receiver, a beat frequency oscillator or BFO is a dedicated oscillator used to create an audio frequency signal from Morse code radiotelegraphy (CW) transmissions to make them audible. The signal from the BFO is mixed with the received signal to create a heterodyne or beat frequency which is heard as a tone ...

  5. Morse code abbreviations - Wikipedia

    en.wikipedia.org/wiki/Morse_code_abbreviations

    Morse code abbreviations are used to speed up Morse communications by foreshortening textual words and phrases. Morse abbreviations are short forms, representing normal textual words and phrases formed from some (fewer) characters taken from the word or phrase being abbreviated.

  6. Swedish Rhapsody (numbers station) - Wikipedia

    en.wikipedia.org/wiki/Swedish_Rhapsody_(Numbers...

    The Stasi "Sprach-Morse Generator" which provided the automated voice was of East German origin, and known to be used in similar coded broadcasts sent by the Main Directorate for Reconnaissance.

  7. American Morse code - Wikipedia

    en.wikipedia.org/wiki/American_Morse_code

    American Morse Code — also known as Railroad Morse—is the latter-day name for the original version of the Morse Code developed in the mid-1840s, by Samuel Morse and Alfred Vail for their electric telegraph. The "American" qualifier was added because, after most of the rest of the world adopted " International Morse Code," the companies that ...

  8. Morse code mnemonics - Wikipedia

    en.wikipedia.org/wiki/Morse_code_mnemonics

    Morse code mnemonics. Morse code mnemonics are systems to represent the sound of Morse characters in a way intended to be easy to remember. Since every one of these mnemonics requires a two-step mental translation between sound and character, none of these systems are useful for using manual Morse at practical speeds.

  9. Modulated continuous wave - Wikipedia

    en.wikipedia.org/wiki/Modulated_continuous_wave

    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 or equivalent audio source. [1][2] When an SSB transmitter is ...