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This is a list of vacuum tubes or thermionic valves, and low-pressure gas-filled tubes, or discharge tubes. Before the advent of semiconductor devices, thousands of tube types were used in consumer electronics.
A small demand for vacuum tubes in guitar amplifiers and very expensive high-fidelity equipment remained. As existing stocks ran out, factories in eastern Europe and China started to manufacture the 6SN7, and higher-gain 6SL7 .
The company expects the American-made tubes to be more expensive than compatible tubes from Russia or China. It confirmed that it has no intention of expanding manufacture outside of the United States. [5] [6] According to a Wired article from March, 2023 the first new U.S. made small signal tubes manufactured will be the type 12AX7. [7]
Vacuum-tube computers, now called first-generation computers, [1] are programmable digital computers using vacuum-tube logic circuitry. They were preceded by systems using electromechanical relays and followed by systems built from discrete transistors. Some later computers on the list had both vacuum tubes and transistors.
The 12AX7 is the most common member of what eventually became a large family of twin-triode vacuum tubes, manufactured all over the world, all sharing the same pinout (EIA 9A). Most use heaters which can be optionally wired in series (12.6V, 150 mA) or parallel (6.3V, 300 mA).
6N14P vacuum tube, USSR (Reflektor) 1965. The 6N14P (Russian: 6Н14П) is a miniature Russian-made medium gain dual triode vacuum tube, intended for service as a low-noise cascode amplifier at HF through VHF frequencies. It is a direct equivalent of ECC84 and 6CW7 vacuum tubes.
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The simplest klystron tube is the two-cavity klystron. In this tube there are two microwave cavity resonators, the "catcher" and the "buncher". When used as an amplifier, the weak microwave signal to be amplified is applied to the buncher cavity through a coaxial cable or waveguide, and the amplified signal is extracted from the catcher cavity.
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