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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,

Interior Design. Plumbing — Design Elements

The plumbing system is a complex system of water supply pipes and drainpipes, sanitary equipment and drainage facilities, vent pipes and more. It supplies our homes, offices, hospitals, schools, business centers, and many other buildings with the main product for life - a water. For effective planning and montage the plumbing equipment, you need obligatory create and use different schematics of plumbing systems, the annotated plumbing diagrams, water lines and waste water plans. These diagrams are an obligatory part of any building project. They are used at all stages - construction, finishing works, interior design, and also during the exploitation of premises in cases of occurence some problems. Numerous libraries offered by the Plumbing and Piping Plans solution from Building Plans area of ConceptDraw Solution Park contain vector objects of plumbing components, sanitary equipment, bathroom fixtures, and many more for easy design the Plumbing and Piping plans, schematic diagrams and blueprints for hot and cold water supply systems, and waste water disposal systems.

Create Floor Plan

ConceptDraw DIAGRAM diagramming and vector drawing software extended with Floor Plans Solution from the Building Plans area of ConceptDraw Solution Park lets you the possibility to create Floor Plan of any complexity in minutes.

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Plumbing and Piping Plans solution extends ConceptDraw DIAGRAM.2.2 software with samples, templates and libraries of pipes, plumbing, and valves design elements for developing of water and plumbing systems, and for drawing Plumbing plan, Piping plan, PVC Pipe plan, PVC Pipe furniture plan, Plumbing layout plan, Plumbing floor plan, Half pipe plans, Pipe bender plans.

HVAC floor plan, HVAC business plan, HVAC marketing plan, blueprints and plans for HVAC, HVAC business plan sample HVAC Plans

HVAC floor plan, HVAC business plan, HVAC marketing plan, blueprints and plans for HVAC, HVAC business plan sample
Use HVAC Plans solution to create professional, clear and vivid HVAC-systems design plans, which represent effectively your HVAC marketing plan ideas, develop plans for modern ventilation units, central air heaters, to display the refrigeration systems for automated buildings control, environmental control, and energy systems.

Half Pipe Plans

Drawing of Half Pipe Plans is quite complex process. But now it's very to design the Half Pipe Plans of any complexity with ConceptDraw DIAGRAM diagramming and vector drawing software extended with Plumbing and Piping Plans Solution.

HVAC Business Plan

Long time you have looked for the convenient and helpful software for drawing HVAC Business Plan? Now ConceptDraw DIAGRAM diagramming and vector drawing software offers you the HVAC Plans Solution from the Building Plans Area that will help you create any desired HVAC Business Plan.