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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.
The EL34 is a thermionic vacuum tube of the power pentode type. The EL34 was introduced in 1955 by Mullard, who were owned by Philips. [1] The EL34 has an octal base (indicated by the '3' in the part number) and is found mainly in the final output stages of audio amplification circuits; it was also designed to be suitable as a series regulator by virtue of its high permissible voltage between ...
Vacuum tubes used in electric guitar amplifiers. Particularly the ones that played important role in shaping modern image of tube sound , as well as notable former and current manufacturers of those tubes.
CV4043 - British-made miniature-tube 13.5W equivalent of the 6BW6, 9-pin base B9A. 6AQ5 - slightly lower specifications to the 6V6GT, miniature glass envelope, 7-pin base B7G. Other equivalents of this tube are the CV1862, EL90, 6005, 6095, 6669, 6928, BPM 04, CK-6005, M8249, N727, 6L31. 12AQ5 - Same as the 6AQ5, but with different heater ratings.
It is used in the power-output stages of audio amplifiers, most commonly now in guitar amplifiers, but originally in radios. The EL84 is smaller and more sensitive than the octal 6V6 that was widely used around the world until the 1960s. An interchangeable North American type is the 6BQ5 (the RETMA tube designation name for the EL84).
Orange amplifier and cabinet from the 2000s with a look reminiscent of the 1960s and 70s. The first guitar amplifiers were made in the 1920s and 1930s using vacuum tubes and speakers to amplify an instrument's sound. These tube amps remained the standard until the 1970s when transistors became cheaper to manufacture and maintain and lighter in ...