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Wireless telegraphy or
radiotelegraphy is
transmission of text
messages by
radio waves,
analogous to
electrical telegraphy using cables.
Before about...
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sending Morse from an airplane.
However the
first regular aviation radiotelegraphy was on airships,
which had
space to
accommodate the large,
heavy radio...
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services eliminated Morse radiotelegraphy. It is
still widely used in
amateur radio which still has
active use of
Morse radiotelegraphy. The CQ
station code...
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receivers as a beat
frequency oscillator (BFO) to make
continuous wave
radiotelegraphy (Morse code)
signals audible. Tone
wheels are also an
important component...
- can be sent by flaghoist,
signal lamp ("blinker"), flag semap****,
radiotelegraphy, and radiotelephony. The
International Code is the most
recent evolution...
-
Practical Engineer included a
reference to "the radiotelegraph" and "
radiotelegraphy". The use of "radio" as a
standalone word
dates back to at
least 30...
-
consisting of
three or four letters.
Ships equipped with
Morse code
radiotelegraphy, or life boat
radio sets,
aviation ground stations,
broadcast stations...
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continuous wave
radiotelegraphy signals produced by
these transmitters required a
different method of reception. The
radiotelegraphy signals produced...
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experiments in
practical Morse code
radiotelegraphy communication in 1895–1897 High
power spark gap
radiotelegraphy transmitter in
Australia around 1910...
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Sidetone is
audible feedback to
someone speaking or
otherwise producing sound as an
indication of
active transmission.
Sidetone is
introduced by some communications...
