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The typical valve using this topology in (rare) current commercial production is the 300B, which yields about 5 watts in SE mode. Rare amplifiers of this type use valves such as the 211 or 845, capable of about 18 watts. These valves are bright emitter transmitting valves, and have thoriated tungsten filaments which glow like light bulbs when ...
The Ampeg SVT is a bass guitar amplifier designed by Bill Hughes and Roger Cox for Ampeg and introduced in 1969. The SVT is a stand-alone amplifier or "head" as opposed to a "combo" unit comprising amp and speaker(s) in one cabinet, and was capable of 300 watts output at a time when most amplifiers could not exceed 100 watts output, making the SVT an important amp for bands playing music ...
With American 807 or British KT66 valves (Williamson recommended the latter type [61]) and specified power supply the amplifier delivered 15 watts of output power. Further increase in output, according to Williamson, required use of four output valves; his 1947 article mentions construction of a 70-watt prototype.
A Yamaha B100-115 combo amp, which contains a 100 watt amplifier and one 15" speaker in a wooden cabinet. A Hartke 500 watt amp "head" on top of an Ashdown 4x10" speaker cabinet. A bass amplifier (also abbreviated to bass amp ) is a musical instrument electronic device that uses electrical power to make lower-pitched instruments such as the ...
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In 1967, Marshall released a 50-watt version of the 100-watt Superlead known as the 1987 Model. In 1969, the plexiglass panel was replaced by a brushed metal front panel. Other early customers included Pete Townshend and John Entwistle of The Who, whose search for extra volume led Marshall to design the classic 100-watt valve amplifier. [16]
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Thus while solid state high power short wave transmitters are technically possible, economic considerations still favor valves above 3 MHz and 10,000 watts. Radio amateurs also use valve amplifiers in the 500–1500 watt range mainly for economic reasons.