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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.
The 7199 is a vacuum tube, combining a pentode and triode. [1] Typically, the pentode was used for the input stage, and the triode as a phase inverter. [2] The tube was used in a number of American guitar amplifiers; the Gibson Guitar Corporation, for instance, used the 7199 in 1961's Falcon for the reverb circuit. [3]
Fischer's final design, the Songwriter 30, was licensed under Komet Amps. It features four cathode-biased EL84/6BQ5 output tubes and two 12AX7 preamp tubes. The amp's name is derived from its distinct clean sound, which Fischer felt was well-suited for singer-songwriters. Both amplifiers are still in production by their respective manufacturers.
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.
Yorkville Sound is a Canadian manufacturer of audio amplifiers (including the Traynor amplifier line), loudspeakers and related professional sound reinforcement equipment. [ 1 ] [ 2 ] Based in Pickering, Ontario , Canada , the firm has a global presence as an importer and exporter of audio electronic products.
Developed around 1946 by RCA engineers [2] in Camden, New Jersey, under developmental number A-4522, it was released for public sale under the 12AX7 identifier on September 15, 1947. The 12AX7 was originally intended as replacement for the 6SL7 family of dual-triode amplifier tubes for audio applications. As a popular choice for guitar tube ...