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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. Vintage amateur radio - Wikipedia

   en.wikipedia.org/wiki/Vintage_amateur_radio

   Vintage amateur radio is a subset of amateur radio hobby where enthusiasts collect, restore, preserve, build, and operate amateur radio equipment from bygone years, such as those using vacuum tube technology.

4. Shortwave radio receiver - Wikipedia

   en.wikipedia.org/wiki/Shortwave_radio_receiver

   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. Shortwave radio receivers are often used by dedicated hobbyists called shortwave listeners.

5. All American Five - Wikipedia

   en.wikipedia.org/wiki/All_American_Five

   The term All American Five (abbreviated AA5) is a colloquial name for mass-produced, superheterodyne radio receivers that used five vacuum tubes in their design. These radio sets were designed to receive amplitude modulation (AM) broadcasts in the medium wave band, and were manufactured in the United States from the mid-1930s until the early 1960s.

6. 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.

7. Lafayette Radio Electronics - Wikipedia

   en.wikipedia.org/wiki/Lafayette_Radio_Electronics

   Lafayette's main competitors were Radio Shack, Allied Radio, Heathkit, and "mom and pop" (independent) radio dealers throughout the United States. Early Lafayette Radio stores were located in Jamaica, N.Y. and Manhattan in the mid-1950s. The electronics kits were produced in the Jamaica facility. [1]