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The grid in a high-vacuum triode is usually kept?
negative
Did vacuum tubes replace transistors?
No the Transistor replaced vacuum tubes in 1947 and later by integrated circuits.This was answered by ...John Nelson Brundage the third seventh grader at GAISER MIDDLE SCHOOL, VANCOUVER SCHOOL DISTRICT, VANCOUVER WASHINGTON
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 is the advantage of triode?
With a diode tube you have no control over the current flow and it can only be used as a rectifier, where the triode consist of a control grid, to control the flow of electrons that will reach the anode, this make it possible to use the triode as a amplifier, compared to a transistor the control grid have the same function as the base of the transistor.Advantages?Over tetrodes and pentodes:1. Operation at higher radio frequencies,2. Lower noise figures,3. Simpler circuitry and only one power supply.
The saturation condition of a triode occurs when the plate is at high voltage values and the grid with respect to the cathode is?
Highly positive
What is an electronic vacuum valve with three electrodes?
Triode
The grid in a high-vacuum triode is usually kept?
negative
Who invented the triode?
In 1906 Lee De Forest, an American engineer (often called the "father of radio"), invented the three-element vacuum tube, or triode.
What is a crystal triode?
A crystal triode is the old term for transistor. Crystal diodes were well established by the time transistors were invented, so using vacuum tube terminology, the logical name for a diode whose current could be controlled by a third element was "crystal triode".
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.
Explain briefly about field effect transistor?
Think of a solid state triode vacuum tube, the mathematical model is almost identical.
What are the function of vacuum tubes?
The earliest vacuum tubes were used as direct display devices, and also as rectifiers of alternating current. In 1906 Lee De Forest invented the triode valve, from which all subsequent vacuum devices have devolved. The triode allowed the electronic amplification of electrical signals, and from this, our modern communications industries have developed. Amplifiers may be made into oscillators by applying feedback. The triode may also be made into a switch (of various sorts), and this is the base on which the digital industries are based. This craft embodies the technologies of electronics, combined with Boolean algebra and signal theory. Quite complex assemblies of valves may be combined, such as triode-hexode combinations. Very large power may be controlled by the triode principles. Modern Thyristor assemblies - today's solid-state equivalent of the vacuum tube - may be used to control Megawatts of power in High Voltage Direct Current transmission systems.
What is triode valve?
A triode valve is a three-electrode electronic device. It can amplify, oscillate or act a a switch. Most commonly, its three electrodes are contained in a completely-evacuated envelope (a near-perfect vacuum). The envelope may be of glass, ceramic or a metal-glass or metal-ceramic construction. Most commonly, the electrons needed for operation are produced by a heated filament or cathode. It is possible to do without the filament/cathode, but such devices are uncommon. The heated filament/cathode defines this as a *thermionic* triode. Some triodes do not use a pure vacuum. Instead, they use low-pressure gas, or mercury vapour, to allow them to operate at higher currents and lower voltage drops than vacuum triodes.
Who is the inventor of vacuum tubes?
Sir John Ambrose Fleming patented the thermionic diode in 1904. Then Lee DeForest put a control grid into it to create the triode in 1906.
The grid in a high-vacuum triode is usually kept negatively charged with respect to the cathode so that the electrons may be?
A grid in a high-vacuum triode is usually kept negatively charged with respect to the cathode so that the electrons may be passed through to the anode, but controlled by changes in grid voltage. The triode accomplishes this by amplifying signals applied.
What is a TRIODE and what are its uses?
A triode is a vacuum-tube (US) aka valve(UK) with three electrodes : an anode, a cathode and a grid. The cathode is heated electrically which boils off a cloud of electrons. The anode is made positive ( typ. 100-500V) which attracts the electrons towards it. The grid is an open structure, usually of thin wires, placed between the anode and cathode, but nearer the cathode. If a negative voltage is applied to the grid the current flow through the tube is reduced. The more negative, the less current. Prior to the development of transistors, tubes were used for all things in radio,TV and electronics. Different tubes had different numbers of electrodes; the triode was particularly suited to high power amplifiers, especially at radio frequencies. Triodes are still used today by shortwave radio stations, and for RF heating equipment.
What is an equivalent diode of a triode valve?
Hard to answer this one.The triode is a diode with a control electrode (the grid) added.The only useful answer is that a triode is a voltage-controlled doide.Try asking the question so that it can be answered more usefully.
