• Thumbnail for Triode
    A triode is an electronic amplifying vacuum tube (or thermionic valve in British English) consisting of three electrodes inside an evacuated glass envelope:...
    31 KB (3,714 words) - 16:53, 14 April 2025
  • Thumbnail for Vacuum tube
    53 Dual Triode Audio Output. Another early type of multi-section tube, the 6SN7, is a "dual triode" which performs the functions of two triode tubes while...
    125 KB (15,976 words) - 22:10, 4 May 2025
  • Thumbnail for List of vacuum tubes
    or pentode, and triode K – Small gas triode or tetrode thyratron L – Single or dual triode, including oscillator triode LD – Triode and diode(s) M –...
    329 KB (40,549 words) - 01:42, 6 May 2025
  • in the case of digital circuits. The transistor replaced the vacuum-tube triode, also called a (thermionic) valve, which was much larger in size and used...
    67 KB (7,592 words) - 06:08, 30 March 2025
  • Thumbnail for Single-ended triode
    A single-ended triode (SET) is a vacuum tube electronic amplifier that uses a single triode to produce an output, in contrast to a push-pull amplifier...
    10 KB (1,395 words) - 09:23, 9 February 2024
  • Thumbnail for 12AX7
    12AX7 (also known as ECC83) is a miniature dual-triode vacuum tube with high voltage gain. Developed around 1946 by RCA engineers in Camden, New Jersey...
    11 KB (1,191 words) - 09:54, 20 May 2025
  • Thumbnail for Nuvistor
    metal, with a ceramic base. Triodes and a few tetrodes and pentodes were made; nuvistor tetrodes were taller than triodes. Nuvistors are among the highest-performing...
    9 KB (979 words) - 19:40, 30 March 2025
  • Thumbnail for Audion
    Audion (redirect from Triode electron tube)
    Lee de Forest as a diode in 1906. Improved, it was patented as the first triode in 1908, consisting of an evacuated glass tube containing three electrodes:...
    24 KB (2,621 words) - 07:21, 15 March 2025
  • A double diode triode is a type of electronic vacuum tube once widely used in radio receivers. The tube has a triode for amplification, along with two...
    4 KB (677 words) - 20:39, 7 March 2020
  • Thumbnail for Cathode follower oscillator
    LC-circuit. A grid-leak couples the grid of the left triode to the LC-circuit. The left triode uses common anode circuit which has high input impedance...
    4 KB (465 words) - 12:30, 8 May 2025
  • Thumbnail for Pentode
    such as the PL36, 27GB5/PL500, PL505 etc. A "triode-pentode" is a single envelope containing both a triode and a pentode, such as an ECF80 or ECL86. The...
    14 KB (1,782 words) - 11:53, 20 July 2024
  • Thumbnail for Amplifier
    signal. The first practical electrical device which could amplify was the triode vacuum tube, invented in 1906 by Lee De Forest, which led to the first amplifiers...
    58 KB (7,150 words) - 08:43, 11 May 2025
  • - triode KBC32 – Dual diode - triode KC1 – Triode KC3 – Triode KC4 – Triode KCF30 – Triode and remote-cutoff pentode, oscillator/mixer KCH1 – Triode/hexode...
    125 KB (15,270 words) - 23:06, 23 December 2024
  • Engineers Medal of Honor "for his early work on oscillating circuits employing triode tubes" and for his work in information theory (which largely paralleled...
    12 KB (1,441 words) - 16:24, 13 July 2024
  • is a classic push–pull front end, typically followed by a driver (triode) and (triode or pentode) output stage (in ultra linear in many cases) to form...
    38 KB (5,587 words) - 12:07, 19 May 2023
  • Thumbnail for Pentagrid converter
    who simply put two grids into what would otherwise have been an ordinary triode valve (the bi-grille or bi-grid). Although technically a four electrode...
    17 KB (2,513 words) - 16:25, 3 May 2025
  • Thumbnail for Semiconductor device
    for their new invention: "Semiconductor Triode", "Solid Triode", "Surface States Triode" [sic], "Crystal Triode" and "Iotatron" were all considered, but...
    37 KB (5,427 words) - 18:03, 18 April 2025
  • Thumbnail for Fluidics
    Fluidics (redirect from Fluidic triode)
    built from them are quite slow compared to electronic devices. The fluidic triode, an amplification device that uses a fluid to convey the signal, has been...
    22 KB (2,354 words) - 06:26, 14 April 2025
  • Thumbnail for JFET
    JFET (redirect from Triode region (JFET))
    in N-JFET due to a small voltage VDS (that is, in the linear or ohmic or triode region) is given by treating the channel as a rectangular bar of material...
    21 KB (2,439 words) - 19:44, 3 February 2025
  • additional grid to the first amplifying vacuum tube, the triode, to correct limitations of the triode. During the period 1913 to 1927, three distinct types...
    34 KB (4,311 words) - 08:24, 26 March 2025
  • Thumbnail for 12AU7
    miniature nine-pin (B9A base) medium-gain dual-triode vacuum tubes. It belongs to a large family of dual-triode vacuum tubes which share the same pinout (RETMA...
    4 KB (420 words) - 02:29, 11 May 2025
  • Thumbnail for Barkhausen–Kurz tube
    The Barkhausen–Kurz tube, also called the retarding-field tube, reflex triode, B–K oscillator, and Barkhausen oscillator was a high frequency vacuum tube...
    8 KB (934 words) - 00:52, 21 May 2023
  • Thumbnail for 6SN7
    6SN7 is a dual triode vacuum tube with an eight-pin octal base. It provides a medium gain (20 dB). The 6SN7 is basically two 6J5 triodes in one envelope...
    7 KB (910 words) - 15:05, 10 December 2023
  • Thumbnail for 955 acorn triode
    The type 955 triode "acorn tube" is a small triode thermionic valve (vacuum tube in USA) designed primarily to operate at high frequency. Although data...
    6 KB (528 words) - 22:27, 18 November 2023
  • In electronics, power amplifier classes are letter symbols applied to different power amplifier types. The class gives a broad indication of an amplifier's...
    34 KB (5,003 words) - 02:16, 28 April 2025
  • Thumbnail for Electrical ballast
    the reference value of 1.0. Early tube-based color TV sets used a ballast triode, such as the PD500, as a parallel shunt stabilizer for the cathode-ray tube...
    24 KB (3,013 words) - 23:48, 14 April 2025
  • Thumbnail for Fender Princeton
    Princeton, the 1948 tweed-covered "TV front," used one 6SL7 or 6SC7 dual-triode tube to provide two stages of RC-coupled voltage amplification in the preamplifier...
    4 KB (627 words) - 07:51, 3 May 2025
  • ECC81/12AT7, dual triode ECC82/12AU7, dual triode ECC83/12AX7, dual triode ECC88/6DJ8, dual triode 12BH7, dual triode 5751, low-noise dual triode EF86, sharp-cutoff...
    4 KB (354 words) - 01:57, 31 October 2024
  • Thumbnail for Control grid
    electrode used in amplifying thermionic valves (vacuum tubes) such as the triode, tetrode and pentode, used to control the flow of electrons from the cathode...
    6 KB (878 words) - 20:21, 11 January 2023
  • Thumbnail for Lee de Forest
    invented the first practical electronic amplifier, the three-element "Audion" triode vacuum tube in 1908. This helped start the Electronic Age, and enabled the...
    68 KB (8,998 words) - 13:14, 7 May 2025