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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.
Peavey Electronics once owned approximately 1,500,000 square feet (140,000 m 2; 34 acres) of warehouse space across North America, Europe and Asia. However, the vast majority of their products have been manufactured overseas since 2004.
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Concept2, Inc. is an American manufacturer of rowing equipment and exercise machines based in Morrisville, Vermont.It is best known for its air resistance indoor rowing machines (known as "ergometers" or "ergs"), which are considered the standard training and testing machines for competition rowers and can be found in most gyms.
Custom Valve 40WR – Same as Custom Valve 40 but with red tolex, cream grill cloth, Celestion Vintage 30 speaker. Custom Valve 40T – Same as Custom Valve 40 but with 2 x 10 inch Celestion speakers. Custom Valve 50BLUE – Same as Custom Valve 50B but with blue tolex. [11] Custom Valve 50B - 50 watt Class AB/PP. 2 x EL34 (BSTR), 3 x 12AX7 (WA ...
In 1960, Ampeg introduced the B-15, a bass combo amplifier with an innovative flip-top function, invented and patented by Oliver. The B-15 was the first in the company's Portaflex series, and after becoming the preferred studio amp of session musicians like James Jamerson and Chuck Rainey. The B-15 and its subsequent variants went on to become ...
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A valve hall is a building which contains the valves of the static inverters of a high-voltage direct current plant. The valves consist of thyristors , or at older plants, mercury arc rectifiers . Mercury arc rectifiers are usually supported by insulators mounted on the floor, while thyristor valves may be either supported by insulators or hung ...