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  2. Agri Broadcast Network - Wikipedia

    en.wikipedia.org/wiki/Agri_Broadcast_Network

    Lindsay Hill, associate farm director and co-founder of Buckeye Ag Radio Network "The Barn" (and wife of Vance) died in a two vehicle accident at the intersection of Ohio State Routes 235 and 41, just north of New Carlisle and west of North Hampton near Springfield, Ohio on Thursday morning May 19, 2011, while she was a new employee for AgDay ...

  3. Heathkit - Wikipedia

    en.wikipedia.org/wiki/Heathkit

    Oscilloscope OL-1 from 1954, the company's first with a relatively small 3-inch CRT which allowed for a highly competitive price of US$ 29.50 (equivalent to $335 in 2023) for the DIY kit. [1] Heathkit is the brand name of kits and other electronic products produced and marketed by the Heath Company.

  4. 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.

  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. 10 Old Tech Gadgets Worth a Pretty Penny Today

    www.aol.com/10-old-tech-gadgets-worth-140005518.html

    Hailing from Japan, these digital pets were all the craze in the ’90s. By enabling users to care for a virtual pet, the pocket-sized devices mimicked all the responsibilities of real pet ...

  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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  9. Superheterodyne receiver - Wikipedia

    en.wikipedia.org/wiki/Superheterodyne_receiver

    A 5-tube superheterodyne receiver manufactured by Toshiba circa 1955 Superheterodyne transistor radio circuit circa 1975. A superheterodyne receiver, often shortened to superhet, is a type of radio receiver that uses frequency mixing to convert a received signal to a fixed intermediate frequency (IF) which can be more conveniently processed than the original carrier frequency.

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