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  2. Nozzle and flapper - Wikipedia

    en.wikipedia.org/wiki/Nozzle_and_flapper

    They were the industry controller amplifier for many decades until the advent of practical and reliable electronic high gain amplifiers. However they are still used extensively for field devices such as control valve positioners, and I to P and P to I converters. A proportional controller schematic is shown here.

  3. Partial stroke testing - Wikipedia

    en.wikipedia.org/wiki/Partial_stroke_testing

    The basic principle behind partial stroke testing is that the valve is moved to a predetermined position in order to determine the performance of the shut down valve. This led to the adaptation of pneumatic positioners used on flow control valve for use in partial stroke testing. These systems are often suitable for use on shutdown valves up to ...

  4. Valve amplifier - Wikipedia

    en.wikipedia.org/wiki/Valve_amplifier

    6N3C power tube. 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. 2025 Fantasy Baseball First Base (1B) Rankings [Video] - AOL

    www.aol.com/sports/2025-fantasy-baseball-first-1...

    After back-to-back down seasons, Guerrero delivered an eye-popping .323 batting average and 30 home runs in 2024. If he's able to build off that production entering just his age-26 season and a ...

  6. National Ignition Facility - Wikipedia

    en.wikipedia.org/wiki/National_Ignition_Facility

    The first stage is a regenerative amplifier in which the pulse circulates 30 to 60 times, increasing its energy from nanojoules to tens of millijoules. The second stage sends the light four times through a circuit containing a neodymium glass amplifier similar to (but much smaller than) the ones used in the main beamlines, boosting the ...

  7. 300B - Wikipedia

    en.wikipedia.org/wiki/300B

    300B dimensions in mm. In electronics, the 300B is a directly-heated power triode vacuum tube with a four-pin base, introduced in 1938 by Western Electric to amplify telephone signals.

  8. Phase Linear - Wikipedia

    en.wikipedia.org/wiki/Phase_Linear

    The second amplifier released was the Phase Linear 400 with 200 watts per channel. It shared the same distinctive brushed aluminum, dual VU meters front panel style as the 700. It retailed for just under $500. [1] The next product was the Phase Linear 4000 Series Auto-correlation Pre-Amplifier introduced in 1973 and manufactured through 1978.

  9. Mark Levinson Audio Systems - Wikipedia

    en.wikipedia.org/wiki/Mark_Levinson_Audio_Systems

    Mark Levinson Audio Systems Ltd. (MLAS) was founded 1972 in Woodbridge, Connecticut (a suburb of New Haven) by Mark Levinson.Original MLAS products were designed by John Curl (Hence the JC abbreviation to many of the early products) under the supervision of Mark Levinson, with a team of associates.