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2. U.S. helicopter armament subsystems - Wikipedia

   en.wikipedia.org/wiki/U.S._helicopter_armament...

   U.S. helicopter armament subsystems. Typical armament for UH-1 gunship, M134 minigun and Mk 40 FFAR with a swivel-mounted M60 machine gun. The United States military has developed a number of Helicopter Armament Subsystems since the early 1960s. These systems are used for offensive and defensive purposes and make use of a wide variety of weapon ...

3. Class-D amplifier - Wikipedia

   en.wikipedia.org/wiki/Class-D_amplifier

   The first Class-D amplifier was invented by British scientist Alec Reeves in the 1950s and was first called by that name in 1955. The first commercial product was a kit module called the X-10 released by Sinclair Radionics in 1964. However, it had an output power of only 2.5 watts. The Sinclair X-20 in 1966 produced 20 watts but suffered from ...

4. Circlotron - Wikipedia

   en.wikipedia.org/wiki/Circlotron

   Circlotron valve amplifier is a type of power amplifier utilizing symmetrical cathode -coupled bridge layout of the output stage. Original circlotrons of 1950s used output transformers to couple relatively high output impedance of vacuum tubes to low-impedance loudspeakers. Circlotron architecture, easily scalable, was eventually adapted to ...

5. 12 reasons why Keegan Bradley is the best choice for United ...

   www.aol.com/sports/12-reasons-why-keegan-bradley...

   Bradley is the first of his generation to get the job, and the first to truly come of age in a post-Tiger golf world. One day, Spieth and Thomas will almost surely be captains, but for now ...

6. Emma Roberts reveals the 1 reason why she hasn't yet ... - AOL

   www.aol.com/news/emma-roberts-reveals-1-reason...

   July 6, 2024 at 3:44 PM. Emma Roberts had a pretty good reason why she has yet to officially share the screen with her Academy Award-winning aunt, Julia Roberts. In an interview with Variety ...

7. Were High-Income Americans Really Paying 91% Income Tax In ...

   www.aol.com/were-high-income-americans-really...

   As the Tax Foundation writes, in 2014, the top 1% of taxpayers paid an average of 36.4% of their income in taxes — or about 5.6 percentage points less than in the 1950s. The idea that high ...

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9. Power amplifier classes - Wikipedia

   en.wikipedia.org/wiki/Power_amplifier_classes

   Power amplifier circuits (output stages) are classified as A, B, AB and C for linear designs—and class D and E for switching designs. The classes are generally based on the proportion of each input cycle (conduction angle) during which an amplifying device passes current. [2]