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  2. Beat frequency oscillator - Wikipedia

    en.wikipedia.org/wiki/Beat_frequency_oscillator

    The BFO is a radio frequency electronic oscillator that generates a constant sine wave at a frequency f BFO that is offset from the intermediate frequency f IF of the receiver. This signal is mixed with the IF before the receiver's second detector ( demodulator ).

  3. BFO - Wikipedia

    en.wikipedia.org/wiki/BFO

    BFO is an abbreviation that stands for: Basic Formal Ontology; Beat frequency oscillator used to create an audio frequency signal for receiving continuous wave (Morse code) transmissions; The Black Forest Observatory in Germany; BiFeO 3 (Bismuth ferrite), an inorganic chemical compound; Boron monofluoride monoxide; Budapest Festival Orchestra

  4. Prosigns for Morse code - Wikipedia

    en.wikipedia.org/wiki/Prosigns_for_Morse_code

    Even though represented as strings of letters, prosigns are rendered without the intercharacter commas or pauses that would occur between the letters shown, if the representation were (mistakenly) sent as a sequence of letters: In printed material describing their meaning and use, prosigns are shown either as a sequence of dots and dashes for the sound of a telegraph, or by an overlined ...

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  6. List of typographical symbols and punctuation marks - Wikipedia

    en.wikipedia.org/wiki/List_of_typographical...

    Feminine ordinal indicator, Degree sign: −: Minus sign: Hyphen-minus, Commercial minus: ×: Multiplication sign: X mark # Number sign: Numero sign. Also known as "octothorpe", "hash" and "hashtag sign" Pound sign № Numero sign: Number sign: Obelus: Division sign, Dagger, Commercial minus, Index ( ) Parenthesis: Bracket, Angle bracket ...

  7. Jimmy Carter funeral service to be held at Washington ...

    www.aol.com/news/jimmy-carter-funeral-held...

    (Reuters) -A state funeral for Jimmy Carter, the former U.S. president who died on Sunday at the age of 100, will be held at the Washington National Cathedral on Jan. 9, according to the U.S. Army ...

  8. Variable-frequency oscillator - Wikipedia

    en.wikipedia.org/wiki/Variable-frequency_oscillator

    A Heathkit amateur radio transmitter circa 1969, with external VFO. A variable frequency oscillator (VFO) in electronics is an oscillator whose frequency can be tuned (i.e., varied) over some range. [1]

  9. Missing hiker thanks rescuers after surviving 13 days on two ...

    www.aol.com/missing-hiker-found-alive-13...

    A 23-year-old hiker who survived 13 days lost in the Australian wilderness after stumbling on two granola bars has thanked his rescuers for enduring “tough conditions” to find him.