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  2. AC adapter - Wikipedia

    en.wikipedia.org/wiki/AC_adapter

    November 1925 magazine ad for battery eliminator. A battery eliminator is an adapter intended to allow a device intended for battery operation, such as a radio, to be operated from an AC outlet. [10] All radios, except crystal sets, used inconvenient and messy vacuum tube batteries until the mid- to late-1920s.

  3. Battery eliminator circuit - Wikipedia

    en.wikipedia.org/wiki/Battery_eliminator_circuit

    In battery-powered equipment, a battery eliminator circuit (BEC) is an electronic voltage regulator used to power a subsystem at a different voltage without the need for a supplemental battery. BECs are commonly used in radio-controlled models , which need separate voltages to power the motor and the RC equipment.

  4. Glossary of electrical and electronics engineering - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_electrical_and...

    battery eliminator An AC adapter, which allows battery operated equipment to run on wall-socket AC power. Bayer filter An optical filter used in color digital cameras. beam tetrode A type of vacuum tube with four active elements plus a pair of beam forming plates. beat frequency

  5. Battery charger - Wikipedia

    en.wikipedia.org/wiki/Battery_charger

    Charging a 12 V lead–acid car battery A mobile phone plugged in to an AC adapter for charging. A battery charger, recharger, or simply charger, [1] [2] is a device that stores energy in an electric battery by running current through it.

  6. Bill Lear - Wikipedia

    en.wikipedia.org/wiki/Bill_Lear

    William Powell Lear (June 26, 1902 – May 14, 1978) was an American inventor and businessman. He is best known for founding Learjet, a manufacturer of business jets.He also invented the battery eliminator for the B battery, and developed the car radio and the 8-track cartridge, an audio tape system. [1]

  7. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    1A7GT/DK32 – Pentagrid converter, re-engineered version of types 1A6 and 1D7-G, designed for use in portable AC/DC/Dry-cell battery radios introduced in 1938. Has 1.4 V/50 mA filament. 1B7-GT – Re-engineered version of types 1C6 and 1C7-G, designed for use in dry-cell battery radios with shortwave bands. Has 1.4 V/100 mA filament

  8. A 75-year-old woman was killed in 1995. A man is now charged ...

    www.aol.com/75-old-woman-killed-1995-161646107.html

    Online court records for Rogers show multiple charges and sentences in the 1990s, including sexual battery and burglary. Back in 1995, investigators mainly tested for blood because DNA testing ...

  9. DC connector - Wikipedia

    en.wikipedia.org/wiki/DC_connector

    Although the nominal voltage of a 12 V lead acid battery is 12 V DC, when the engine is running the car's battery charging system will bring the system voltage to 13.8 V DC or higher. [10] The possible range of battery voltages from 11–15 V DC must be taken into account by devices attached to the cigar lighter socket.

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