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Electrical Symbols — Electron Tubes

Invented in 1904 by John Ambrose Fleming, vacuum tubes were a basic component for electronics throughout the first half of the twentieth century, which saw the diffusion of radio, television, radar, sound reinforcement, sound recording and reproduction, large telephone networks, analog and digital computers, and industrial process control. From the mid-1950s solid-state devices such as transistors gradually replaced tubes. However, there are still a few applications for which tubes are preferred to semiconductors; for example, the magnetron used in microwave ovens, and certain high-frequency amplifiers. 26 libraries of the Electrical Engineering Solution of ConceptDraw DIAGRAM make your electrical diagramming simple, efficient, and effective. You can simply and quickly drop the ready-to-use objects from libraries into your document to create the electrical diagram.
"In electronics, a vacuum tube, electron tube (in North America), tube, or thermionic valve or valve (in British English) is a device controlling electric current through a vacuum in a sealed container. The simplest vacuum tube, the diode, contains only two elements; current can only flow in one direction through the device between the two electrodes, as electrons emitted by the hot cathode travel through the tube and are collected by the anode. Addition of a third and additional electrodes allows the current flowing between cathode and anode to be controlled in various ways. The device can be used as an electronic amplifier, a rectifier, an electronically controlled switch, an oscillator, and for other purposes.
Vacuum tubes mostly rely on thermionic emission of electrons from a hot filament or a cathode heated by the filament. Some electron tube devices rely on the properties of a discharge through an ionized gas." [Vacuum tube. Wikipedia]
"The EL34 is a thermionic valve or vacuum tube of the power pentode type. It has an international octal base (indicated by the '3' in the part number) and is found mainly in the final output stages of audio amplification circuits and was designed to be suitable as a series regulator by virtue of its high permissible voltage between heater and cathode and other parameters. The American RETMA tube designation number for this tube is 6CA7. Russian analog is 6P27S (Cyrillic: 6П27C )" [EL34. Wikipedia]
This circuit diagram sample was redrawn from the Wikipedia Commons file: EL34 schematics (circuit diagram).gif. [commons.wikimedia.org/ wiki/ File:EL34_ schematics_ %28circuit_ diagram%29.gif]
The example "Circuit diagram - EL 34 schematics" was drawn using the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
EL34 shemathics
EL34 shemathics, tube triode, tube pentode, transformer, magnetic-core, terminal, switch point, junction, fixed resistor, resistor, fixed capacitor, capacitor, direction, flow, transmission path, chassis, frame ground connection,
Used Solutions

Electrical Symbols, Electrical Diagram Symbols

Electrical Diagram Symbols
When drawing Electrical Schematics, Electrical Circuit Diagrams, Power Systems Diagrams, Circuit and Wiring Diagrams, Digital and Analog Logic Schemes, you will obligatory need the electrical symbols and pictograms to represent various electrical and electronic devices, such as resistors, wires, transistors, inductors, batteries, switches, lamps, readouts, amplifiers, repeaters, relays, transmission paths, semiconductors, generators, and many more. Today these symbols are internationally standardized, so the diagrams designed using them are recognizable and comprehensible by specialists from different countries. Electrical Engineering Solution included to ConceptDraw Solution Park provides 26 libraries with 926 commonly used electrical schematic and electrical engineering symbols making the reality the easy drawing of Electrical diagrams, schematics and blueprints. Now you need only a few minutes to create great-looking Electrical diagram, simply choose required electrical design elements from the libraries, drag them on the needed places at the document and connect in a suitable way.
The vector stencils library "Electron tubes" contains 36 element symbols of electron tubes.
Use it for drawing electrical schematics and electronic circuit diagrams in the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ engineering-electrical
Diode, directly heated
Diode, directly heated, tube diode,
Diode, indirectly heated
Diode, indirectly heated, tube diode,
Diode, envelope, direct. heated
Diode, envelope, direct. heated, tube diode,
Diode, envelope, indirect. heated
Diode, envelope, indirect. heated, tube diode,
Triode, directly heated
Triode, directly heated, tube triode,
Triode, indirectly heated
Triode, indirectly heated, tube triode,
Triode, envelope, direct. heated
Triode, envelope, direct. heated, tube triode,
Triode, envelope, indirect. heated
Triode, envelope, indirect. heated, tube triode,
Tetrode, directly heated
Tetrode, directly heated, tube tetrode,
Tetrode, indirectly heated
Tetrode, indirectly heated, tube tetrode,
Tetrode, envelope, direct. heated
Tetrode, envelope, direct. heated, tube tetrode,
Tetrode, envelope, indirect. heated
Tetrode, envelope, indirect. heated, tube tetrode,
Pentode, directly heated
Pentode, directly heated, tube pentode,
Pentode, indirectly heated, external connection
Pentode, indirectly heated, external connection, tube pentode,
Pentode, indirectly heated, internal connection
Pentode, indirectly heated, internal connection, tube pentode,
Pentode, envelope, direct. heated
Pentode, envelope, direct. heated, tube pentode,
Pentode, envelope, indirect. heated, external connection
Pentode, envelope, indirect. heated, external connection, tube pentode,
Pentode, envelope, indirect. heated, internal connection
Pentode, envelope, indirect. heated, internal connection, tube pentode,
Diode, directly heated 2
Diode, directly heated 2, tube diode,
Diode, indirectly heated 2
Diode, indirectly heated 2, tube diode,
Diode, envelope, direct. heated 2
Diode, envelope, direct. heated 2, tube diode,
Diode, envelope, indirect. heated 2
Diode, envelope, indirect. heated 2, tube diode,
Triode, directly heated 2
Triode, directly heated 2, tube triode,
Triode, indirectly heated 2
Triode, indirectly heated 2, tube triode,
Triode, envelope, direct. heated 2
Triode, envelope, direct. heated 2, tube triode,
Triode, envelope, indirect. heated 2
Triode, envelope, indirect. heated 2, tube triode,
Tetrode, directly heated 2
Tetrode, directly heated 2, tube tetrode,
Tetrode, indirectly heated 2
Tetrode, indirectly heated 2, tube tetrode,
Tetrode, envelope, direct. heated 2
Tetrode, envelope, direct. heated 2, tube tetrode,
Tetrode, envelope, indirect. heated 2
Tetrode, envelope, indirect. heated 2, tube tetrode,
Pentode, directly heated 2
Pentode, directly heated 2, tube pentode,
Pentode, indirectly heated, external connection 2
Pentode, indirectly heated, external connection 2, tube pentode,
Pentode, indirectly heated, internal connection 2
Pentode, indirectly heated, internal connection 2, tube pentode,
Pentode, envelope, direct. heated 2
Pentode, envelope, direct. heated 2, tube pentode,
Pentode, envelope, indirect. heated, external connection 2
Pentode, envelope, indirect. heated, external connection 2, tube pentode,
Pentode, envelope, indirect. heated, internal connection 2
Pentode, envelope, indirect. heated, internal connection 2, tube pentode,
Used Solutions

Electrical Symbols — Semiconductor

Semiconductors are crystalline or amorphous solids with distinct electrical characteristics. They are of high resistance — higher than typical resistance materials, but still of much lower resistance than insulators. Their resistance decreases as their temperature increases, which is behavior opposite to that of a metal. Finally, their conducting properties may be altered in useful ways by the deliberate, controlled introduction of impurities into the crystal structure, which lowers its resistance but also permits the creation of semiconductor junctions between differently-doped regions of the extrinsic semiconductor crystal. The behavior of charge carriers which include electrons, ions and electron holes at these junctions is the basis of diodes, transistors and all modern electronics. 26 libraries of the Electrical Engineering Solution of ConceptDraw DIAGRAM make your electrical diagramming simple, efficient, and effective. You can simply and quickly drop the ready-to-use objects from libraries into your document to create the electrical diagram.
The vector stencils library "Design elements - Electron tubes" contains 36 element symbols of electron tubes.
Use it for drawing electrical schematics and electronic circuit diagrams.
"One classification of vacuum tubes is by the number of active electrodes, (neglecting the filament or heater). A device with two active elements is a diode, usually used for rectification. Devices with three elements are triodes used for amplification and switching. Additional electrodes create tetrodes, pentodes, and so forth, which have multiple additional functions made possible by the additional controllable electrodes.
Other classifications are:
(1) by frequency range (audio, radio, VHF, UHF, microwave),
(2) by power rating (small-signal, audio power, high-power radio transmitting),
(3) by design (e.g., sharp- versus remote-cutoff in some pentodes),
(4) by application (receiving tubes, transmitting tubes, amplifying or switching, rectification, mixing),
(5) special qualities (long life, very low microphonic and low noise audio amplification, and so on).
Multiple classifications may apply to a device; for example similar dual triodes can be used for audio preamplification and as flip-flops in computers, although linearity is important in the former case and long life in the latter.
Tubes have different functions, such as cathode ray tubes which create a beam of electrons for display purposes (such as the television picture tube) in addition to more specialized functions such as electron microscopy and electron beam lithography. X-ray tubes are also vacuum tubes. Phototubes and photomultipliers rely on electron flow through a vacuum, though in those cases electron emission from the cathode depends on energy from photons rather than thermionic emission." [Vacuum tube. Wikipedia]
The symbols example "Design elements - Electron tubes" was drawn using the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Vacuum tubes
Vacuum tubes, tube triode, tube tetrode, tube pentode, tube diode,
Used Solutions

Electrical Symbols — Transistors

A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. It is composed of semiconductor material usually with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor's terminals changes the current through another pair of terminals. Because the controlled (output) power can be higher than the controlling (input) power, a transistor can amplify a signal. Today, some transistors are packaged individually, but many more are found embedded in integrated circuits. 26 libraries of the Electrical Engineering Solution of ConceptDraw DIAGRAM make your electrical diagramming simple, efficient, and effective. You can simply and quickly drop the ready-to-use objects from libraries into your document to create the electrical diagram.

Wiring Diagrams with ConceptDraw DIAGRAM

Wiring Diagrams with ConceptDraw DIAGRAM
A Wiring Diagram is a comprehensive schematic that depicts the electrical circuit system, shows all the connectors, wiring, signal connections (buses), terminal boards between electrical or electronic components and devices of the circuit. Wiring Diagram illustrates how the components are connected electrically and identifies the wires by colour coding or wire numbers. These diagrams are necessary and obligatory for identifying and fixing faults of electrical or electronic circuits, and their elimination. For designing Wiring Diagrams are used the standardized symbols representing electrical components and devices. ConceptDraw Solution Park offers the Electrical Engineering solution from the Engineering area with 26 libraries of graphics design elements and electrical schematic symbols for easy drawing various Wiring Diagrams, Electrical Circuit and Wiring Blueprints, Electrical and Telecom schematics of any complexity, Electrical Engineering Diagrams, Power Systems Diagrams, Repair Diagrams, Maintenance Schemes, etc. in ConceptDraw DIAGRAM software.