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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 audio amplifier technical specification - Wikipedia

    en.wikipedia.org/wiki/Valve_audio_amplifier...

    Even more rarely, higher powered SETs are produced commercially, usually using the 211 or 845 transmitting valves, which are able to deliver 20 watts, operating at 1000 V. Notable amplifiers in this class are those from Audio Note corporation (designed in Japan), including the "Ongaku", voted amplifier of the year during the late 1990s.

  4. 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.

  5. Hayden (electronics company) - Wikipedia

    en.wikipedia.org/wiki/Hayden_(electronics_company)

    It is a sister company to Ashdown Engineering, which makes high-quality, hand-wired, vacuum-tube (or valve in Britain) amplifiers in England. At the end of 2007 it was announced that Dave Green, Matamp's chief engineer, would be joining Hayden full-time as 'Valve Amp Guru'.

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    www.aol.com/best-p-500-etf-invest-141500093.html

    Here's why and which S&P 500 ETF is one of the best to own. ... Sign Up For Free » A person pointing at a chart. Image source: Getty Images. This S&P 500 ETF comes highly recommended.

  7. Michelle Obama Skips Jimmy Carter's Funeral and Is 'Still in ...

    www.aol.com/michelle-obama-skips-jimmy-carters...

    The former first lady was notably absent from President Jimmy Carter's state funeral service, leading Barack Obama and Donald Trump to be seated next to one another

  8. Report: Wake Forest to hire Washington State coach Jake Dickert

    www.aol.com/sports/report-wake-forest-hire...

    Washington State is 23-20 in three-plus seasons under Dickert. He took over midway through the 2021 season after coach Nick Rolovich was fired over a prolonged vaccination fight with the university.

  9. Valve audio amplifier - Wikipedia

    en.wikipedia.org/wiki/Valve_audio_amplifier

    A valve audio amplifier or vacuum tube audio amplifier is a valve amplifier used for sound reinforcement, sound recording and reproduction. Until the invention of solid state devices such as the transistor , all electronic amplification was produced by valve (tube) amplifiers.