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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.
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What is an electronic vacuum valve with three electrodes?
Triode
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 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 operations of a triode valve?
Within some operating range, plate current is linearly related to grid voltage.
Why we use odd harmonic and do not use even harmonic?
That is not true. When you overdrive a valve triode you produce even harmonics.Aphex AudioXciter uses also only the even harmonics.
What is dual triode tubes?
It's a thermionic valve/electron tube with *two* triodes in the one envelope. Examples: 3A5, 6J6, 6SN7/6SL7, 12AU7/12AX7, ECC32, ECC82.
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.
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.
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.
Can be a triode tube PET 25W be damage due to electric fluctuation?
Can a triode tube PET 25W be damaged due to electric fluctuation
What are the advantages of using transistor as an switch instead of diode?
1. A transistor *is* a triode- this is the general name for any three-electrode electronic device. 2. Most people understand "triode" to mean a tride vacuum tube/valve. 3. The transistor (i) needs no heated filament/cathode, so it uses much less power than a valve triode, (ii) because of (i), transistors do not "burn out" with age, so they have much longer lifetimes, are much more reliable, and generate much less waste heat, (iii) transistors can operate at much lower power than triode valves, and at much higher frequencies, (iv) transistors can be made much smaller than triodes, by a factor of many tens of thousands, (v) from early on, transistors were much cheaper than triode valves.
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".
