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  • Magnetic amplifier

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    The magnetic amplifier (colloquially known as a "mag amp") is an electromagnetic device for amplifying electrical signals. The magnetic amplifier was invented early in the 20th century, and was used as an alternative to vacuum tube amplifiers where robustness and high current capacity were required. World War II Germany perfected this type of amplifier, and it was used in the V-2 rocket. The magnetic amplifier was most prominent in power control and low-frequency signal applications from 1947 to about 1957, when the transistor began to supplant it. The magnetic amplifier has now been largely superseded by the transistor-based amplifier, except in a few safety critical, high-reliability or extremely demanding applications. Combinations of transistor and mag-amp techniques are still used.

  • Ford F-Series (seventh generation)

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    1981 Ford F-150 (aftermarket modifications) 1982–1983 Ford F-100 utility (Australia-market RHD model) The seventh generation of the Ford F-Series is a line of pickup trucks and medium-duty commercial trucks that was produced by Ford from 1979 to 1986. For the first time since 1965, the pickup trucks were based upon a completely new chassis and body. Distinguished by its squarer look, sharper lines and flatter panels, the trucks were designed with improved fuel efficiency in mind; to this end, Ford added its new AOD automatic overdrive (four-speed) transmission as an option on light-duty models. The 4-speed manual and 3-speed C6 automatic transmission were retained from previous years. To increase longevity, Ford increased the use of galvanized body panels to fight corrosion. Light Pickups were available in six configurations: Regular Cab, SuperCab (extended cab), or Crew Cab (four full doors), in either 6ft or 8ft bed lengths. They are typically considered to be the last of the "classic" Ford trucks, due to features such as sealed beam headlights that would become obsolete in the next body style.

  • Tesla Model S

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    The Tesla Model S is a full-sized / Mid-size luxury all-electric five-door liftback car, produced by Tesla, Inc., and introduced on June 22, 2012. The EPA official range for the 2017 Model S 100D, which is equipped with a battery pack, is , higher than any other electric car. The December 2017 Consumer Reports owner satisfaction survey has the Tesla Model S at the top. The EPA rated the 2017 90D Model S's energy consumption at 3.096 miles per kWh (200.9 watt-hours per kilometer or 32.33 kWh/100 mi or 20.09 kWh/100 km) for a combined fuel economy of 104 miles per gallon gasoline equivalent ( or ). In 2016, Tesla updated the design of the Model S to closely match that of the Model X. , the following versions are available: 75D, 100D and P100D. In 2013, the Model S became the first electric car to top the monthly new car sales ranking in any country, twice leading in Norway, in September and December 2013 and also in Denmark in December 2015. Global Model S sales passed 250,000 units in September 2018. The U.S. is its leading market, with about 119,000 units delivered through December 2017. The Tesla Model S was the top selling plug-in electric car worldwide in 2015 and 2016, and by the end of 2017 continued to rank as the second most-sold electric car in history after the Nissan Leaf.

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