Vacuum tube amplifier amplifier with transistor amplifiers differ, one, tube amplifierVjaservice manual download site
Prior to the 60, the audio has been dominant in the field is to use vacuum tubes, various sound equipment, the amplifier is no exception. The late 60 's, 70 's in particular, can be said to be the tube the most unfortunate times. Because of its own shortcomings (large volume and high power), so that it gradually became obsolete, especially in our country even more so. The late 70 's, tubes began to perk up in a foreign country. Into the 80 's tube amplifiers more and more popular. Especially after the invention of high-quality audio CD machine, along with restricting advances in vacuum tube amplifier output transformers technology, it tube amplifiers "and" CD player Curt "digital sound" vacuum tube amplifier's status has improved. Older enthusiasts appreciate its beautiful lifted that year, its first comeback have been welcomed by them. At home and abroad, it tube amplifiers and sometimes even a status symbol.Vjaservice manual download site
Second, comparison of transistor amplifier with tube amplifiersVjaservice manual download site
1, features circuit structureVjaservice manual download site
Transistor amplifiers are working under high current at low voltage, operating voltage at the amplifier level within dozens of volts and currents of several or dozens of. Circuit design and greater use of direct coupled (such as OCL, BTL) no output transformer circuit, output power can be done on a big scale, up to hundreds of Watts of power, the electrical properties are very high.Vjaservice manual download site
Vacuum tube amplifiers are working at high voltage and low current. Amplifier tubes at the end of the plate voltage up to 400-500V even thousands of volts, but to hundreds of Ma of current through the tube is only dozens of Ma. Input dynamic range too large, the conversion speed.Vjaservice manual download site
Most of vacuum tube amplifier using discrete components, hand-lift wire, welded, low efficiency and high cost. Crystal amplifier using transistors and integrated circuits by combining, the extensive use of printed circuit boards, high efficiency, stable welding quality, high performance indicators.

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