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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.
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.
Details of the LNA front-end gets you started building your own backyard installation. Robert B. Cooper, Jr. 51/3 March 1980 Thunderstorm alarm [3] Simple radio accessory provides early warning of approaching storm. Calvin R. Graf 51/3 March 1980 Triggered oscilloscope [4] A 2-MHz bandwidth and a zero-baseline display for under $125.
Kit 7.5 MHz ext No 48 kHz 0/1 USB Yes Yes Yes SoftRock Lite II [114] 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 [115] Kit or Pre-built 180 kHz – 3.0 MHz ext No
Heathkit made amateur radio kits almost from the beginning. In addition to their low prices compared with commercially manufactured equipment, Heathkits appealed to amateurs who had an interest in building their own equipment, but did not necessarily have the expertise or desire to design it and obtain all the parts themselves.
The GNU Radio Companion is a graphical UI used to develop GNU Radio applications. [12] This is the front-end to the GNU Radio libraries for signal processing . GRC was developed by Josh Blum during his studies at Johns Hopkins University (2006–2007), then distributed as free software for the October 2009 Hackfest .
A foxhole radio is a makeshift radio that was built by soldiers in World War II for entertainment, to listen to local radio stations using amplitude modulation. [ 1 ] [ 2 ] They were first reported at the Battle of Anzio , Italy, spreading later across the European and Pacific theaters .
The term radio receiver is understood in this article to mean any device which is intended to receive a radio signal in order to generate useful information from the signal, most notably a recreation of the so-called baseband signal (such as audio) which modulated the radio signal at the time of transmission in a communications or broadcast system.
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