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A 'Triode Valve' is a vacuum tube amplifier or switch of the simplest form. It has three parts: A heated cathode, a control grid and an collection plate anode.
Electrons are emitted from the cathode and drawn towards the positive anode. Interposed between the two is a control grid that controls the cathode-to-anode electron flow by being charged appropriately, for example a negative charge (ground) on the grid will hamper the flow since the negative electron charge on the grid will obstruct the electron flow to the positive anode.
OK, but the question was "use as an amplifier".
In a triode, the anode current responds to the grid voltage, as explained above.
Now, if a load (and the simplest load is a resistor) is placed between the anode terminal and the supply voltage, the anode current will create a voltage drop across the load resistor.
If the anode current varies, so will the voltage across the anode load resistor.
A varying grid voltage causes a varying anode current, so a varying grid voltage causes a varying voltage across the load resistor.
Now, if one volt of grid voltage change only causes one volt of load resistor change voltage change, it's not much use.
A triode can give a greater load voltage change than the grid voltage that caused it. This is amplification, where voltage out is more than voltage in.
Typical voltage gains range from a low of just about 2.0 to high values over 70 times.
What else can I help you with?
How a triode works as basic amplifier?
A triode works as a basic amplifier by the use of radio waves. The radio waves produce a heat that is amplified.
What is the name of the tube used in class A amplifier with the function of dual triode developed in USA and published in September 15 1947?
There are two names for the tube used in Class A amplifiers developed in the USA. This valve in the US is called vacuum tube audio amplifier. In the UK they are known as valve audio amplifiers.
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.
What is an electronic vacuum valve with three electrodes?
Triode
What is an audion tube?
An audion tube is an electric amplifier device invented in 1906, as the forerunner of the triode.
Where can one purchase a valve amp?
Valve amplifier's can be purchased at most local music equipment stores. The average price for a valve amplifier is around $800.00 USD. Smaller valve amplifier's can be purchased for around $300.00 USD.
What do you mean by amplification factor of a triode valve?
"Triode valve" does not make sense. Please restate the question.Umm... yes, it *does* make sense.Triode "valve" is non-U.S. English for Triode tube.OK.Amplification factor is the amount of anode voltage change to give a chosen amount of anode current change, compared to the amount of grid voltage change for the same anode current change.The symbol is u (it's actually the Greek character for m), and it's called "mu".That is, using "d" for "amount of change":dVa/dVg for equal dIa.Typical values are as low as 2 (6AS7/6080 regulator valve) to 12 (6C4/12AU7 medium-mu triode) to around 100 (6AV6 high-mu triode).Some special microwave triode have mu values in the 300s.
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.
Why diode can't use as amplifier?
A2. For amplification to take place, one needs three terminals; an input, an output, and a control signal.This indicates the original " valve" naming; after a mechanical valve, where a small effort on a (hydraulic) valve may be used to control a larger effort of the controlled fluid.A1. If u meant why diode can't be used as an amplifier diode is used as a rectifier..it converts ac current to dc and there is an inbuilt voltage drop... so it can't be used as an amplifier
What is the operations of a triode valve?
A triode valve amplifies electrical signals by controlling the flow of electrons between the cathode and anode using a control grid. When a small voltage is applied to the grid, it modulates the flow of electrons between the cathode and anode, leading to amplification of the input signal.
Why you use tetrode instead of triode?
a tetrode is used when you need a screen grid tube, but a suppressor grid tube can't be used.OK, but the question was "why use a tetrode instead of a triode?"So, the answer...1. A tetrode has a higher voltage/power gain than a triode.2. A tetrode has less anode-grid feedback capacitance than a triode, and can operate in common-cathode radio frequency circuits without the neutralisation (or other corrective circuitry) that is needed by a triode.
What is triode pentode?
A triode pentode is a thermionic valve, also known as a vacuum tube (USA). It comprises a triode which has three electrodes and a pentode which has five electrodes, both sections of the valve are enclosed in a single glass envelope. They were often used in domestic audio amplifiers in the 'valve era' where the triode section acted as a preamplifier to increase the amplitude of the low level signal from the input source such as a tape head or a crystal pick-up; and the pentode section provided sufficient power amplification to drive a small loudspeaker. Minimising the number of valves in such designs significantly reduced the overall power consumption, heat dissipation and manufacturing cost of the equipment. It also reduced the retail price, making record players more affordable to the domestic consumer. Triode pentodes are still used in some current production, British built Hi Fi amplifiers because, with careful attention to the design, they can be configured to out-perform double triodes (two triodes in a single envelope) in the driver stages. Submitted by Graham Stannett (Croxley Audio). I would be grateful if you would be kind enough to contact me if you wish to amend this WikiAnswer or if you would like more information regarding valve amplifiers.
