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The ultimate version of Cocking's Quality Amplifier, 1946. Absence of cathode bypass capacitors was a "trademark" feature of Williamson's design inherited directly from Cocking's work [5] In 1925 Edward W. Kellogg published the first comprehensive theory of audio power amplifier design.
In electronics, motorboating is a type of low frequency parasitic oscillation (unwanted cyclic variation of the output voltage) that sometimes occurs in audio and radio equipment and often manifests itself as a sound similar to an idling motorboat engine, a "put-put-put", in audio output from speakers or earphones.
Output transformerless (OTL) is a type of vacuum tube audio power amplifier, which omits an output transformer for the purpose of greater linearity and fidelity. Conventional vacuum tube amplifier designs rely upon an output transformer to couple the amplifier's output stage to the loudspeaker.
The EL34 is a thermionic vacuum tube of the power pentode type. The EL34 was introduced in 1955 by Mullard, who were owned by Philips. [1] The EL34 has an octal base (indicated by the '3' in the part number) and is found mainly in the final output stages of audio amplification circuits; it was also designed to be suitable as a series regulator by virtue of its high permissible voltage between ...
Due to these characteristics, it is regularly used to replace 6550 tubes by end users seeking a guitar amplifier tone with less distortion. [6] Some of the amplifiers which shipped with the KT88 power tube include the Hiwatt , Marshall Major , and some Ampeg models.
A few years after moving from Seattle, Washington to Los Angeles, California in 1976, Steven Fryette landed a job as a repair technician at Valley Arts Guitar. Fryette honed his skills doing custom work, repairs, and modifications for the likes of Eddie Van Halen, Steve Lukather, Larry Carlton, Tommy Tedesco, Ry Cooder, Buzz Feiten, Carlos Rios, Duane Eddy, and many other guitar players.
A crossed-field amplifier (CFA) is a specialized vacuum tube, first introduced in the mid-1950s and frequently used as a microwave amplifier in very-high-power transmitters. Raytheon engineer William C. Brown 's work to adapt magnetron principles to create a new broadband amplifier is generally recognized as the first CFA, which he called an ...
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.
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