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A vacuum tube consists of several electrodes (e.g. cathode, grid(s), beam formers, plate). The cathode is kept red hot by a resistance heater so that it emits electrons. Grids, beam formers, etc. control the flow of these electrons from cathode to plate. The plate collects the electrons.
Depending on type of tube and the circuit it is connected to, vacuum tubes can act as: amplifiers, oscillators, modulators, demodulators, mixers, switches, logic gates, pulse shapers, flip-flops, etc.
Solid state components like bipolar transistors, JFETs, and MOSFETs can perform these very same functions as vacuum tubes; but with much less heat, power, voltage, size, and higher reliability. Only in applications where high power is absolutely necessary have vacuum tubes retained dominance (e.g. the cavity magnetron microwave power oscillator tube in microwave cookers).
What else can I help you with?
What are the elements of a vacuum tube?
A vacuum tube is simply a tube with no oxygen nor carbon dioxide in it (aka no air).
How many KB is a vacuum tube?
Kilobytes and vacuum tubes are not in the same category. At best, a twin triode vacuum tube is a single flip-flop and can hold 1 bit of information, making a vacuum tube about 0.000122 of a kilobyte.
What does vacuum tube mean?
an electron tube containing a near-vacuum that allows the free passage of electric current.
When did transistors replace the vacuum tube?
A Transistor is an electronic device which amplifies electrical signals, or acts as a switch. Most of the research on Transistors was performed by Shockley in 1947. That was when, the advantages of the solid state device similar in function to a Triode Vacuum tube were understood and implemented. The basic advantage was compactness..
What stores sell a vacuum tube?
The following stores sell a vacuum tube. Walmart, Home Hardware, Rona, Totems, and much more. Some of the stores listed might not sell a vacuum tube depending where they are located. These stores are located in Canada.
What is function of vacuum tube?
amplifierrectifiermodulatordemodulatorswitchindicatordisplaysensorDRAMrelay driverlogic gateetc.
What is the function of a Plumbicon vacuum tube?
The Plumbicon (trademark of Phillips)is an imaging tube, think of it as the active part of a camera.
What computer component did the transistor replace?
the vacuum tube
What are the Adavantages and disadvantages of vacuum tube?
when the vacuum sucks up things it goes through the tube and into the bag ...Unless you are talking about electronics, then a vacuum tube is used to form an amplifying circuit. Some tubes can emit cathode rays onto a screen (Cathode Ray Tube = CRT) to display a picture and some can function as diodes to regulate current flow.
What are the elements of a vacuum tube?
A vacuum tube is simply a tube with no oxygen nor carbon dioxide in it (aka no air).
What is in a vacuum tube?
Millman's theorem
How can you replace transistor with vacuum tube?
A: ABSOLUTELY but only in its function . To implement a change requires additional power requirements and design
Reasons for no air in vacuum tubes?
Vacuum tubes perform their various functions on the principle of streaming electrons: that is electrons able to fly across space from one electrode to another. If there is air in the tube then this is a barrier to the electron's flight and the tube cannot function.
Where was vacuum tube was made?
who made the vacuum tubes
How many KB is a vacuum tube?
Kilobytes and vacuum tubes are not in the same category. At best, a twin triode vacuum tube is a single flip-flop and can hold 1 bit of information, making a vacuum tube about 0.000122 of a kilobyte.
What is the function of the ECC83 vacuum tube?
The ECC83 vacuum tube is more commonly sold as the 12AX7 and is a triode tube. This tube is used in a similar way that a modern transistor would be used in audio amplification applications. The ECC83 has a smaller size and a high gain at lower signal levels making it perfect for an audio pre-amp.
What does vacuum tube mean?
an electron tube containing a near-vacuum that allows the free passage of electric current.
