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12AU7 is also known in Europe under its Mullard–Philips tube designation ECC82. [1] There are many equivalent tubes with different names, some identical, some designed for ruggedness, long life, or other characteristics; examples are the US military 5814A and the European special-quality ECC82 and E182CC.
Old production General Electric "narrow plate" 12AT7 (left) and current production "long plate" Electro-Harmonix 12AT7 (right) 12AT7 (also known in Europe by the Mullard–Philips tube designation of ECC81) is a miniature nine-pin medium-gain (60) dual-triode vacuum tube popular in guitar amplifiers.
2A3 – Directly heated power triode, used for AF output stages in 1930s–1940s audio amplifiers and radios. 2A5 – Power Pentode (Except for heater, electronically identical to types 42 and 6F6) 2A6 – Dual diode, high-mu triode (Except for heater, electronically identical to type 75)
12AX7 (also known as ECC83 [1]) is a miniature dual-triode vacuum tube with high voltage gain.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.
Fender Blues Junior front view. The Blues Junior is a tube guitar amplifier introduced in 1995 by the Fender Musical Instrument Corporation.It is aimed at achieving the warm, tube-driven tone common in many styles of American blues and blues rock dating back to the 1950s, while remaining both portable and affordable.
The Absolute Sound was founded in 1973 by Harry Pearson, who was its editor-in-chief and publisher. In the early years, TAS was a quarterly, digest-sized magazine and accepted no advertisements. [1] During the 1970s and 1980s, TAS (along with Stereophile) was influential in the audiophile industry. [2]
PS Audio is an American company specializing in high-fidelity audio components (also known as high-end audio) equipment for audiophiles and the sound recording industry. It currently produces audio amplifiers , preamplifiers , power related products, digital-to-analog converters , streaming audio , and loudspeakers .
An operating SB-256 tube with all bits set to “1”. The tube is in the quiescent, "maintenance" state, with read plate active. Also shown, a 12AU7 tube for size comparison. In this respect, the Selectron works in the opposite sense of the Williams tube.