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  2. Amateur radio homebrew - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_homebrew

    Homebrew is an amateur radio slang term for home-built, noncommercial radio equipment. [1] Design and construction of equipment from first principles is valued by amateur radio hobbyists, known as "hams", for educational value, and to allow experimentation and development of techniques or levels of performance not readily available as commercial products.

  3. Crystal radio - Wikipedia

    en.wikipedia.org/wiki/Crystal_radio

    A family listening to a crystal radio in the 1920s Greenleaf Whittier Pickard's US Patent 836,531 "Means for receiving intelligence communicated by electric waves" diagram US Bureau of Standards 1922 Circular 120 "A simple homemade radio receiving outfit" taught Americans how to build a crystal radio.

  4. List of software-defined radios - Wikipedia

    en.wikipedia.org/.../List_of_software-defined_radios

    Kit 7.5 MHz ext No 48 kHz 0/1 USB Yes Yes Yes SoftRock Lite II [104] Kit 1.891 – 1.795 MHz, 3.57 – 3.474 MHz, 7.104 – 7.008 MHz, 10.173 – 10.077 MHz, 14.095 – 13.999 MHz (also purchasable in other tunings) ext No 96 kHz 0/1 USB Yes Yes Yes SoftRock RX Ensemble II LF [105] Kit or Pre-built 180 kHz – 3.0 MHz ext No

  5. List of amateur radio transceivers - Wikipedia

    en.wikipedia.org/wiki/List_of_amateur_radio...

    The (American version) radio's main receiver covers 30 kHz through 60 MHz, 142 MHz through 152 MHz, and 420 through 450 MHz (plus 1240 through 1300 MHz with the "X" model). The sub-receiver tunes between 118 and 174 MHz, and from 220 to 512 MHz (VFO ranges).

  6. A. Atwater Kent - Wikipedia

    en.wikipedia.org/wiki/A._Atwater_Kent

    Ad for an Atwater Kent Radio receiver in the Ladies' Home Journal (September, 1926) Ad for Atwater Kent Radio Model 35, 1927. In 1921, Kent produced his first radio components, selling the do-it-yourself kits consisting of "breadboards" that could be assembled by early radio enthusiasts. [3]

  7. Shortwave radio receiver - Wikipedia

    en.wikipedia.org/wiki/Shortwave_radio_receiver

    Modern portable shortwave radio receiver with digital frequency display and keypad for direct frequency entry. A shortwave radio receiver is a radio receiver that can receive one or more shortwave bands, between 1.6 and 30 MHz. A shortwave radio receiver often receives other broadcast bands, such as FM radio, Longwave and Mediumwave.

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