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A crystal radio receiver, ... signals, although FM designs have been ... A large number of prefabricated novelty items and simple kits could be found through the ...
The foxhole radio, like a mineral crystal radio receiver, had no power source and ran off the power received from the radio station. They were named, likely by the press, for the foxhole, a defensive fighting position used during the war. There are also accounts of prisoners of war in World War II and in the Vietnam War having constructed ...
Crystal radios had no amplifying components to increase the loudness of the radio signal; the sound power produced by the earphone came solely from the radio waves of the radio station being received, intercepted by the antenna. Therefore, the sensitivity of the detector was a major factor determining the sensitivity and reception range of the ...
Crystal controlled two channels Yes Yes Yes Cyan [33] Pre-built 100 kHz – 18 GHz 1 – 3 GHz (8 fully independent Rx chains and 8 fully independent Tx chains, each capable of up to 1 GHz of RF bandwidth) 16 16 Yes 1–3 GSPS ADCs; 2.5 GSPS DACs; 1 – 16 receive and 1 – 16 transmit (total of 16 radio chains) 4x 40Gbit/s QSFP, Ethernet Yes Yes
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.
The crystal radio receiver is the simplest kind of radio receiver or tuner, and was the basis for the first commercially successful type of radio product design. Inexpensive and reliable, it was sold in millions of units and became popular in kits used by hobbyists, and was a major factor in the popularity of radio broadcasting around 1920.
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