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  2. AC/DC receiver design - Wikipedia

    en.wikipedia.org/wiki/AC/DC_receiver_design

    In areas using 110–120 volt AC, a simple half-wave rectifier limited the maximum plate voltage that could be developed; this was adequate for relatively low-power audio equipment, but television receivers or higher-powered amplifiers required either a more complex voltage doubler rectifier or warranted the use of a power transformer with a ...

  3. The Farm (Tennessee) - Wikipedia

    en.wikipedia.org/wiki/The_Farm_(Tennessee)

    Most homes phased out the use of kerosene lamps by 1975, as they converted to 12 Volt lighting and RV appliances or re-purposed automotive lighting fixtures. Off-grid low voltage 12 Volt DC systems were also sometimes powered by swapping vehicle batteries. After the economic change in 1983, all homes were connected to the standard electrical grid.

  4. List of television manufacturers - Wikipedia

    en.wikipedia.org/wiki/List_of_television...

    Post 1987 TVs were made by Mitsubishi and sold as Electrohome in name only Element Electronics: 2006 present Emerson Radio & Phonograph: 1947 1973 EMI - - Farnsworth: 1947 1965 Ferguson Electronics - - Ferranti - - Finlux (Vestel) 1971 present Fisher Electronics - - Fujitsu: 1992 present Funai: 1980s present Geloso: 1931 1972 General Electric ...

  5. List of battery sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_battery_sizes

    This battery, introduced in 1901, was very common in continental Europe until the 1970s. It usually contains three B cells in series. In Switzerland as of 2008, 4.5-volt batteries account for only 1% of primary battery sales. [89] PP3, 9-volt, or E [90] Radio battery Smoke alarm battery Square battery Transistor battery 006P MN1604

  6. 12-volt battery - Wikipedia

    en.wikipedia.org/wiki/12-volt_battery

    12-volt battery may refer to: Automotive battery; Lantern battery; A23 battery, for RF transmitters This page was last edited on 23 August 2019, at 15:27 (UTC) ...

  7. Porta-Color - Wikipedia

    en.wikipedia.org/wiki/Porta-Color

    A Porta-Color television receiver in use. General Electric's Porta-Color was the first "portable" color television introduced in the United States in 1966.. The Porta-Color set introduced a new variation of the shadow mask display tube.