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Vacuum tube with five electrodes
A pentode is an electronic device having five electrodes. The term most commonly applies to a three-grid amplifying vacuum tube or thermionic valve that
Pentode
Transistor with 5 active terminals
A pentode transistor is any transistor having five active terminals. One early pentode transistor was developed in the early 1950s as an improvement over
Pentode_transistor
pentode, R8 1S6 – Diode, pentode, R8 1T6 – Diode, pentode, R8 1V5 – Power pentode, R8 1V6 – Triode-pentode converter, FL 1W5 – Sharp-cutoff pentode,
List_of_vacuum_tubes
Device that controls current between electrodes
data sheets often use the terms beam pentode or beam power pentode instead of beam power tube, and use a pentode graphic symbol instead of a graphic symbol
Vacuum_tube
Type of tetrode vacuum tube
frequency. The beam tetrode produces greater output power than a triode or pentode with the same anode supply voltage. The first beam tetrode marketed was
Beam_tetrode
KL1 – Power pentode KL2 – Power pentode KL4 – Power pentode KL5 – Power pentode KL35 – 340 mW Power pentode KLL32 – 1.2W Dual power pentode KY80 = U26
List of Mullard–Philips vacuum tubes
List_of_Mullard–Philips_vacuum_tubes
Vacuum tube
(Mullard–Philips tube designation EL90) is a miniature 7-pin (B7G) audio power output pentode vacuum tube with ratings virtually identical to the 6V6 at 250 V. It was
6AQ5
Vacuum tube (valve)
The EL34 is a thermionic vacuum tube of the power pentode type. The EL34 was introduced in 1955 by Mullard, which was owned by Philips. The EL34 has an
EL34
HF radio communications receiver
Type 3 6AK6 Pentode 2 5654 Pentode 4 12AU7/5814A Triode 2 26Z5W Full-Wave Vacuum Rectifier 1 3TF7 Current Regulator 6 6BA6/5749W Pentode 3 6C4/6100 Triode
R-390A
Vacuum tube with four active electrodes
was quickly superseded by the rf pentode, while the latter was initially developed as an alternative to the pentode as an audio power amplifying device
Tetrode
The GU-50 (Russian: ГУ-50) is a power pentode vacuum tube intended for 50 watt operation as a linear RF amplifier on frequencies up to 120 MHz. It is
GU-50
Amplifying tubes containing control grids, such as triodes, tetrodes, pentodes, and beam tetrodes, are represented by families of curves measured for
Vacuum_tube_characteristics
Vacuum tube
and sharp-cutoff Pentode - in one envelope. Each of the sections has a separate cathode and is electrically independent. The pentode section is intended
6GH8
a triode section, "F" for a pentode section, "H" for a hexode or heptode section, and "L" for a power tetrode or pentode section. The first number identified
Double_diode_triode
The 6EJ7 pentode and its equivalents are often found in high-gain vacuum tube microphone amplifiers which require the sharp cutoff of a pentode. It generally
Virtual_Valve_Amplifier
Type of electronic circuit
Ultra-linear electronic circuits are those used to couple a tetrode or pentode vacuum-tube (also called "electron-valve") to a load (e.g. to a loudspeaker)
Ultra-linear
Electrode used to control electron flow within a vacuum tube
amplifying thermionic valves (vacuum tubes) such as the triode, tetrode and pentode, used to control the flow of electrons from the cathode to the anode (plate)
Control_grid
Vacuum tube for audio applications
The EF86 is a high transconductance sharp cutoff pentode vacuum tube with Noval (B9A) base for audio-frequency applications. It was introduced by the
EF86
Class of medium-low gain, pentode vacuum tube amplifiers
of medium-low gain, pentode vacuum tube amplifiers using the Noval socket configuration. Although originally marketed as pentode tubes for use in early
12BV7
Discrete device in an electronic system
(see Vacuum tube). Diode or rectifier tube Amplification Triode Tetrode Pentode Hexode Pentagrid (Heptode) Octode Traveling-wave tube Klystron Oscillation
Electronic_component
Characteristic quality of sounds from vacuum tube amplifiers
their transfer characteristics. Later forms of the tube, the tetrode and pentode, have quite different characteristics that are in some ways similar to
Tube_sound
The 7199 is a vacuum tube, combining a pentode and triode. Typically, the pentode was used for the input stage, and the triode as a phase inverter. The
7199
Pictogram used to represent various electrical and electronic devices or functions
triode Vacuum tube tetrode (pin letters not part of symbol) Vacuum tube pentode For multiple pole switches, a dotted or dashed line can be included to
Electronic_symbol
Power pentode vacuum tube
The EL84 is a vacuum tube of the power pentode type. It is used in the power-output stages of audio amplifiers, most commonly now in guitar amplifiers
EL84
British manufacturer of electronic components
its shares to Philips in 1927. In 1928, the company introduced the first pentode valve to the British market. Mullard opened a new manufacturing plant at
Mullard
Single-grid amplifying vacuum tube having three active electrodes
and the ancestor of other types of vacuum tubes such as the tetrode and pentode. Its invention helped make amplified radio technology and long-distance
Triode
Solid-state electrically operated switch also used as an amplifier
sub-microscopic, water-filled channels. Multigate devices: Tetrode transistor Pentode transistor Trigate transistor (prototype by Intel) Dual-gate field-effect
Transistor
Pentode vacuum tube
The 7AK7 is a pentode vacuum tube (thermionic valve). According to its manufacturer, Sylvania, it was "designed for service in electronic computers".
7AK7
number identified a 'high slope' (sharp-cutoff) valve. For power pentodes and triode-pentode combinations, even numbers usually indicate linear (audio power
Mullard–Philips tube designation
Mullard–Philips_tube_designation
Dutch electrical engineer (1900–1990)
– 30 August 1990) was a Dutch electrical engineer and inventor of the pentode and the gyrator. He is also known for a theorem in circuit theory, Tellegen's
Bernard_D._H._Tellegen
High-frequency pentode tube
of electronics, the EF50 is an early all-glass wideband remote cutoff pentode designed in 1938 by Philips. It was a landmark in the development of vacuum
EF50
П) – Receiver tube S (Russian: С) – Special tube, such as a tetrode, a pentode or a CRT T (Russian: Т) – Carrier frequency tube U (Russian: У) – Amplifier
Russian_tube_designations
Diode that emits light from an organic compound
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
OLED
Array of logic gates that are reprogrammable
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Field-programmable_gate_array
The 6AK5 vacuum tube is a miniature 7-pin sharp-cutoff pentode used as RF or IF amplifier especially in high-frequency wide-band applications at frequencies
6AK5
Guitar amplifier series
"Simul-Class" system, where two of the power tubes (always 6L6s) run in class AB pentode while the other two tubes (either 6L6s or EL34s) run in class A triode
Mesa/Boogie_Mark_Series
Type of vacuum tube
horizontal oscillator service. 12AE10 twin pentode. Designed for FM discriminator/detector, and audio output. 38HK7 pentode diode. Designed for horizontal output
Compactron
Frequency mixer of a superhet radio
current of 600 mA – double that of more conventional types. The use of a pentode would seem an unlikely choice for a frequency converter because it only
Pentagrid_converter
Technical specifications and detailed information on the valve audio amplifier
Amplifying tubes containing control grids, such as triodes, tetrodes, pentodes, and beam tetrodes, are represented by families of curves measured for
Valve audio amplifier technical specification
Valve_audio_amplifier_technical_specification
Dutch electronics company, subsidiary of TPV Technology
celebrate a centenary of Philips audio history (dating back to the first Pentode radio tube patent). In 2012, Philips and TP Vision made statements about
TP_Vision
Electronic circuits that utilize digital signals
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Digital_electronics
American vacuum tube standard
In the 6BX6 (pentode with g3 brought to its own pin), the screen around the assembly is not counted, whereas the 6BR7 (also a pentode with g3 brought
RETMA_tube_designation
Devices that measure magnetic field strength using the Hall effect
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Hall-effect_sensor
Vacuum tube used to display images
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Cathode_ray_tube
Electrical component that can break an electrical circuit
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Switch
Wire screen used to suppress secondary emission in vacuum tubes
grid and the plate electrode (anode). The suppressor grid is used in the pentode vacuum tube, so called because it has five concentric electrodes: cathode
Suppressor_grid
DC-to-DC power converter with an output voltage greater than its input voltage
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Boost_converter
Guitar amplifier produced by Fender
Champ in having two versus one preamp stage (6SC7 dual-triode vs 6SJ7 pentode) and added the tone control that was absent in the Champs; the 12AX7-based
Fender_Princeton
Semiconductor light source
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Light-emitting_diode
Type of amplifier that emphasizes a specific frequency in a noisy signal
Transcript — Dr. Robert Dicke. Michels, W. C.; Curtis, N. L. (1941). "A Pentode Lock-In Amplifier of High Frequency Selectivity". Review of Scientific
Lock-in_amplifier
Microchip manipulating light instead of electricity
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Photonic_integrated_circuit
First electronic stored-programme computer, 1948
tubes)—300 diodes and 250 pentodes—and had a power consumption of 3500 watts. The arithmetic unit was built using EF50 pentode valves, which had been widely
Manchester_Baby
Type of transistor
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Diffused_junction_transistor
Chinese-American electrical engineer (1912–1995)
dissertation was "A Complete Analysis of the Resistance Coupled Amplifier Using Pentode Tubes", supervised by Frederick Terman. As World War II/War of Resistance
Pan_Wen-Yuan
Specialized vacuum tube
and delivered an output voltage large enough to directly drive an end pentode while still allowing for some negative feedback. As most of the grids were
Nonode
Family of VHF/UHF vacuum tubes
The 955 is a triode. The 954 and 956 types are sharp and remote cut-off pentodes, respectively, all with indirect 6.3 V, 150 mA heaters. Types 957, 958
Acorn_tube
Passive two-terminal electrical component that stores energy in its magnetic field
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Inductor
became common. The technique was revisited in the 1930s when newer, smaller pentode tubes made compact receiver designs practical, and size became a primary
Reflex_receiver
Visual indicator of the amplitude of an electronic signal
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Magic_eye_tube
Audio frequency beam tetrode
and offers significant performance improvements over comparable power pentodes. In the 21st century, the KT66 is manufactured and used in some high fidelity
KT66
Two-stage amplifier in an electronic circuit
cathode setup, the second one with a common grid) as a replacement for a pentode, and so the name may be assumed to be an abbreviation of "casc(aded triode
Cascode
Type of MOSFET where the gate is electrically isolated
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Floating-gate_MOSFET
Valve amplifier designed by David Theodore Nelson Williamson
inherently more stable, cheaper and efficient three-stage, ultralinear or pentode-output designs. In 1925 Edward Kellogg published the first comprehensive
Williamson_amplifier
Microphone
different output transformers were used within the U 47. The VF 14 was a pentode made exclusively by Telefunken for Neumann from 1946 to 1957; the discontinuation
Neumann_U_47
Central computer component that executes instructions
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Central_processing_unit
Type of resistive heater
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Self-regulating_heater
Vacuum tube
to the anode and offers significant performance improvements over power pentodes. The 6L6 was the first successful beam power tube marketed. In the 21st
6L6
Power supply connections for integrated circuits
K, not C) and grid voltages in analyses of vacuum triode, tetrode, and pentode circuits. 4000 series 7400 series Bob Widlar Common collector Differential
IC_power-supply_pin
DC-DC voltage step-down power converter
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Buck_converter
Electronic circuit formed on a small, flat piece of semiconductor material
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Integrated_circuit
UK-based manufacturer of guitar amplification and effects pedals
dual channel amplifier uses pre-amp valves (most specifically the EF86 pentode) that are associated with smaller Vox amps. The range includes 15, 30,
Blackstar_Amplification
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Lr-diode
American country musician (born 1972)
DB4 model, so named because it is "Doc & Brad's fourth amp design". The pentode preamp tube is a 5879 with EL84 output tubes. In June 2021, Paisley promoted
Brad_Paisley
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Hole_accumulation_diode
Integrated circuit customized for a specific task
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Application-specific integrated circuit
Application-specific_integrated_circuit
Type of resistor whose resistance varies with temperature
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Thermistor
Device used in television cameras
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Video_camera_tube
Micro-electronic component
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
System_on_a_chip
Automatic fuze that detonates an explosive at a predetermined distance
entered the war. Pye's group was apparently unable to get their rugged pentodes to function reliably under high pressures until 6 August 1941, which was
Proximity_fuze
Type of transistor
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Field-effect_transistor
Extremely sensitive solid-state photodetector
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Silicon_photomultiplier
Early form of computer memory
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Williams_tube
Electronic device/component that increases the strength of a signal
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Amplifier
British radio receiver made during World War II
a triode-hexode frequency mixer, a variable-μ RF pentode IF amplifier and a high slope output pentode. A "Westector" solid-state copper oxide diode was
Utility_Radio
Type of resistor, usually with three terminals
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Potentiometer
Late vacuum tube design designed to compete with transistors
is made of metal, with a ceramic base. Triodes and a few tetrodes and pentodes were made; nuvistor tetrodes were taller than triodes. Nuvistors are among
Nuvistor
When a particle's interactions with a material cause it to emit new particles
side effect could be put to use by using some older valves (e.g., type 77 pentode) as dynatron oscillators. This effect was prevented by adding a third grid
Secondary_emission
English electronics engineer (1903–1942)
connected as a triode, and if the tap was at the supply end, as a pure pentode. Blumlein discovered that if the tap was placed at a distance 15–20% down
Alan_Blumlein
Type of display device
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Quantum_dot_display
Vacuum tube electronic amplifier that uses a single triode to produce an output
single-ended tetrode, beam tetrode/beam power tube/kinkless tetrode, and pentode amplifiers with the same functionality and similar circuitry; e.g. this
Single-ended_triode
American electronics manufacturer
independent sections-a triode and a pentode and was intended as a local oscillator mixer for TV and FM receivers. The pentode section of the tube may be used
Tung-Sol
Passive electronic component providing electrical resistance
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Resistor
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Planar_Hall_sensor
Electronic component
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Transient-voltage-suppression diode
Transient-voltage-suppression_diode
Vacuum tube electronic oscillator circuit
grid electrode caused by an increase in voltage on a second grid) in a pentode or other multigrid vacuum tube. These replaced the dynatron circuit and
Dynatron_oscillator
Early commercial computer
computer had roughly 2000 vacuum tubes (mostly type CV2179/A2134 pentodes, EL81 pentodes and CV2493/ECC88 double triodes) and 2000 germanium diodes. Nineteen
Ferranti_Mercury
Type of DC-to-DC converter
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Buck–boost_converter
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Hybrid_pixel_detector
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
History_of_the_transistor
Semiconductor diode producing short impulses
Junction Gate FET (JFET) Organic FET (OFET) Light-emitting transistor (LET) Pentode transistor Point-contact transistor Programmable unijunction transistor
Step_recovery_diode
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PENTODE
PENTODE
PENTODE
PENTODE
PENTODE
PENTODE
PENTODE
PENTODE
PENTODE
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