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A valve RF amplifier (UK and Aus.) or tube amplifier is a device for electrically amplifying the power of an electrical radio frequency signal. Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers during the 1960s and 1970s, initially for receivers and low power stages of ...
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.
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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Because of this, Dumble amplifiers are the most expensive boutique amplifiers on the used market, [3] and prices have risen rapidly. In 2012, Vintage Guitar magazine described the Dumble Overdrive Special as the most valuable in the product line, with used amplifiers fetching between $70,000 and $150,000. [4] Other examples have sold for more. [5]
Tube amps are more fragile, require more maintenance, and are usually more expensive than solid-state amps. Tube amplifiers produce more heat than solid-state amplifiers, but few manufacturers of these units include cooling fans in the chassis. While tube amplifiers do need to attain a proper operating temperature, if the temperature goes above ...