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  2. List of valve amplifier designs - Wikipedia

    en.wikipedia.org/wiki/List_of_valve_amplifier...

    LEAK TL/12 Point One Amplifier. The first commercially produced amplifier with distortion of 0.1% was the LEAK Type 15 "Point One" of 1945, using KT66 vacuum tubes (valves) connected as triodes, with 26 dB feedback over 4 stages including the output transformer. In 1948 LEAK produced the TL/12 which was also rated at 0.1% but featured improved ...

  3. Valve amplifier - Wikipedia

    en.wikipedia.org/wiki/Valve_amplifier

    A valve amplifier or tube amplifier is a type of electronic amplifier that uses vacuum tubes to increase the amplitude or power of a signal. Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers in the 1960s and 1970s.

  4. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    This is a list of vacuum tubes or thermionic valves, ... Backward-wave amplifier ... SRS4451 – Radiation-cooled dual tetrode up to 500 MHz, 60 W; SRS4452 = QQE03/20 ...

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  6. The Best AI Stocks to Invest $500 in This Year - AOL

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    Artificial intelligence (AI) was a market-driving theme last year, with AI stocks helping the S&P 500, the Nasdaq, and the Dow Jones Industrial Average each soar in the double digits. Companies ...

  7. NASA spacecraft 'safe' after closest-ever approach to Sun - AOL

    www.aol.com/news/nasa-spacecraft-safe-closest...

    The spacecraft passed 3.8 million miles (6.1 million km) from the solar surface on Dec. 24, flying into the sun's outer atmosphere called the corona, on a mission to help scientists learn more ...

  8. Which 38 Republicans voted against Trump's plan to keep the ...

    www.aol.com/38-republicans-voted-against-keeping...

    The U.S Capitol is seen after U.S, President-elect Donald Trump called on U.S. lawmakers to reject a stopgap bill to keep the government funded past Friday, raising the likelihood of a partial ...

  9. Ampeg - Wikipedia

    en.wikipedia.org/wiki/Ampeg

    In 1960, Ampeg introduced the B-15, a bass combo amplifier with an innovative flip-top function, invented and patented by Oliver. The B-15 was the first in the company's Portaflex series, and after becoming the preferred studio amp of session musicians like James Jamerson and Chuck Rainey. The B-15 and its subsequent variants went on to become ...