A vacuum tube, electron tube, valve (British usage), or tube (North America) is a device that controls electric current flow in a high vacuum between...
120 KB (15,394 words) - 08:07, 27 August 2024
A vacuum-tube computer, now termed a first-generation computer, is a computer that uses vacuum tubes for logic circuitry. While the history of mechanical...
25 KB (2,718 words) - 20:27, 25 August 2024
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...
329 KB (40,580 words) - 17:54, 4 August 2024
Cathode (redirect from Cathode (vacuum tube))
from the original on 2 January 2014. Poole, Ian (2012). "Vacuum tube electrodes". Vacuum Tube Theory Basics Tutorial. Radio-Electronics.com, Adrio Communications...
24 KB (2,877 words) - 19:49, 28 August 2024
In the early days of electronics, devices that used vacuum tubes (called valves in British contexts), such as radios, were powered by batteries. Each battery...
7 KB (984 words) - 05:05, 10 June 2024
A vacuum (pl.: vacuums or vacua) is space devoid of matter. The word is derived from the Latin adjective vacuus (neuter vacuum) meaning "vacant" or "void"...
67 KB (7,594 words) - 04:53, 13 August 2024
An X-ray tube is a vacuum tube that converts electrical input power into X-rays. The availability of this controllable source of X-rays created the field...
21 KB (2,753 words) - 18:21, 27 August 2024
Triode (redirect from Triode vacuum tube)
A triode is an electronic amplifying vacuum tube (or thermionic valve in British English) consisting of three electrodes inside an evacuated glass envelope:...
30 KB (3,670 words) - 17:34, 8 June 2024
electrons emitted from the cathode filament. In fact, each tube in a VFD is a triode vacuum tube because it also has a mesh control grid. Unlike liquid crystal...
25 KB (2,963 words) - 15:15, 19 August 2024
Vacuum-tube computers, now called first-generation computers, are programmable digital computers using vacuum-tube logic circuitry. They were preceded...
27 KB (939 words) - 19:50, 13 June 2024
Vactrain (redirect from Vacuum tube train)
A vactrain (or vacuum tube train) is a proposed design for very-high-speed rail transportation. It is a maglev (magnetic levitation) line using partly...
15 KB (1,730 words) - 17:35, 8 June 2024
The 807 is a beam tetrode vacuum tube, widely used in audio- and radio-frequency power amplifier applications. 807s were used in audio power amplifiers...
8 KB (897 words) - 21:58, 18 November 2023
traveling-wave tube (TWT, pronounced "twit") or traveling-wave tube amplifier (TWTA, pronounced "tweeta") is a specialized vacuum tube that is used in...
21 KB (2,487 words) - 23:32, 11 August 2024
vacuum tube in appearance, its operation does not depend on thermionic emission of electrons from a heated cathode. It is hence a cold-cathode tube (a...
22 KB (2,616 words) - 04:32, 31 July 2024
Electronic oscillator (redirect from Vacuum tube oscillator)
other vacuum-tube oscillators. Vacuum-tube feedback oscillators became the basis of radio transmission by 1920. However, the triode vacuum tube oscillator...
61 KB (6,624 words) - 03:31, 31 July 2024
In vacuum tube technology, HT or high tension describes the main power supply to the circuit, which produces the current between anode and cathode. It...
3 KB (471 words) - 15:30, 26 March 2024
Valve amplifier (redirect from Vacuum tube amplifier)
A valve amplifier or tube amplifier is a type of electronic amplifier that uses vacuum tubes to increase the amplitude or power of a signal. Low to medium...
21 KB (2,898 words) - 20:18, 29 July 2024
Wunderlich refers to a series of vacuum tubes introduced in the early 1930s. Wunderlichs were designed to be used as full-wave detectors in AM radio receivers...
2 KB (217 words) - 03:53, 10 May 2022
Rectifier (section Diode vacuum tube (valve))
of current. Physically, rectifiers take a number of forms, including vacuum tube diodes, wet chemical cells, mercury-arc valves, stacks of copper and...
64 KB (8,949 words) - 19:27, 12 August 2024
Cathode ray (section Vacuum tubes)
emitted by the negative electrode, or cathode, in a vacuum tube. To release electrons into the tube, they first must be detached from the atoms of the...
19 KB (2,648 words) - 03:54, 12 May 2024
A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, which emit electron beams that are manipulated to display images on a...
265 KB (28,861 words) - 07:30, 28 August 2024
Anode (section Vacuum tube anode)
flows through the device. Similarly, in a vacuum tube only one electrode can emit electrons into the evacuated tube due to being heated by a filament, so...
20 KB (2,569 words) - 21:11, 27 May 2024
Tube sound (or valve sound) is the characteristic sound associated with a vacuum tube amplifier (valve amplifier in British English), a vacuum tube-based...
44 KB (5,688 words) - 08:44, 9 July 2024
Electronic symbol (section Vacuum tubes)
mode, P‑channel MOSFET Vacuum tube diode Vacuum tube triode Vacuum tube tetrode (pin letters not part of symbol) Vacuum tube pentode For multiple pole...
21 KB (1,554 words) - 17:01, 21 August 2024
1965) was an American entrepreneur and businessman, specializing in vacuum tubes and radio manufacturing. He is best known for being the most successful...
16 KB (1,763 words) - 06:37, 5 March 2024
Radio receiver (section Vacuum tube era)
used in some early vacuum tube radios because they were more sensitive than the vacuum tube grid-leak detector. During the vacuum tube era, the term "detector"...
152 KB (16,593 words) - 04:46, 31 July 2024
Transistor (section Comparison with vacuum tubes)
devices. Compared with the vacuum tube, transistors are generally smaller and require less power to operate. Certain vacuum tubes have advantages over transistors...
98 KB (10,226 words) - 19:10, 23 August 2024
A Crookes tube (also Crookes–Hittorf tube) is an early experimental electrical discharge tube, with partial vacuum, invented by English physicist William...
33 KB (4,113 words) - 21:47, 28 August 2024
A magic eye tube or tuning indicator, in technical literature called an electron-ray indicator tube, is a vacuum tube which gives a visual indication...
12 KB (1,518 words) - 20:12, 6 February 2024
Amplitude modulation (redirect from Clamp tube modulation)
the amplifying ability of the Audion tube, invented in 1906 by Lee de Forest, solved these problems. The vacuum tube feedback oscillator, invented in 1912...
35 KB (4,576 words) - 18:26, 17 August 2024