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You cannot build a power tube amplifier without bias. At minimum, you need some kind of negative bias on the control grid, and you might need positive bias on the screen grid as well as cathode voltage on the suppressor grid.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoFirst you need a design. Usually that is in the form of a schematic circuit diagram. You can copy an old design or there are books with examples or even the theory so you could learn to design your own.
To actually build it, most tube power amps are built on a metal chassis, so you need to be able to work metal, especially bending and cutting holes for mounting tube sockets.
The wiring is usually point-to-point soldering between tube sockets, so you need soldering equipment and skill.
You also have to consider getting parts. Many amplifier tubes are still made, but not all are easy to find or cheap. And the output Transformers can be hard to find and expensive.
Tube amplifiers use high voltages that can be dangerous or even deadly, so you need to understand the risks and how to build and test safely.
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Which vacuum based device is widely used as a power amplifier in satellite communication system?
The Traveling Wave Tube Amplifier (TWTA) is widely used as a power amplifier in satellite communication systems. It amplifies signals in the microwave frequency range and is capable of providing high power output with low noise and distortion. TWTA technology has been utilized for several decades in satellite communication due to its reliable performance and efficiency.
Forward bias and reverse bias?
forward bias is in the direction a junction or vacuum tube wants to conduct currentreverse bias is in the direction a junction or vacuum tube opposes conducting current
Can I conect 4 ohm loudspeakers to 8 ohm output of my tube amp as the sound is better?
No. An amplifier designed for an 8 ohm load works best with an 8 ohm load. You can connect a 4 ohm load to it, but the current rating curve of the amplifier will not match the voltage rating curve, and will will not achieve rated power. Attempting to achieve rated power will result in damage to the amplifier. Look at this mathematically... If the amplifier is rated 100 watts into 8 ohms, then it can produce 28 volts doing so. It will also produce 3.5 amperes at that power. So, when we say the amplifier is rated 100 watts into 8 ohms, we mean that the amplifier is rated 28 volts or 3.5 amperes, whichever comes first. Connect a 4 ohm load to this amplifier, and 3.5 amperes will induce 14 volts and 50 watts. You cannot get 100 watts because that would require 5 amperes and 20 volts, and the amplifier cannot produce 5 amperes.
What are the basic applications of clippers and clampers?
Used in speech processing for communications (radio) applications. The process of clipping raises the overall average speech power level. It's a crude form of audio compression. Clamping : Used in analogue video processing to define portions of the luminance waveform (black level, sync pulses etc.) to pre-determined voltage levels. Also previously used as a method of modulating vacuum tube AM transmitters, e.g. a tetrode power amplifier tube being screen modulated by a triode clamp tube. (copied from Yahoo Answers)
What is magnetic amplifier type Automatic Voltage Regulator?
Its a feedback control system which utilizes the saturation of the main transformer to control output voltage. It is late 1880's technology. Was used 25 years before the invention of the amplifier tube. For more information see this link: https://en.wikipedia.org/wiki/Magnetic_amplifier
What does bias mean in a valve--tube-- radio receiver circuit?
Like many electronic devices, tubes (aka valves) are closer to linear in certain operating ranges--meaning the output is a scaled version of the input when operating in the linear region. However, these linear regions are not typically at zero volts. So a DC bias is added to the AC input signal, shifting the signal into the linear region of the device. The DC bias can be removed from the output, leaving the amplified signal. Essentially the bias shifts the "zero" point for the signal to match the amplifier characteristics. Choosing bias is an important consideration in amplifier design. Amplifiers are designated by a "class" according to their bias--class A, class B, class AB, class C (there are other classes but they aren't used with tubes). Because the bias signal is the zero signal input, the bias determines how much power the tube uses when idle. For example, a class A amplifier is biased to the middle of the tube operating range so it uses about 50% power when idle, which is wasteful and makes a lot of heat.
What is the best tube acoustic amplifier?
whats the best tube acoustic amplifier ?
Forward bias and reverse bias?
forward bias is in the direction a junction or vacuum tube wants to conduct currentreverse bias is in the direction a junction or vacuum tube opposes conducting current
Which vacuum based device is widely used as a power amplifier in satellite communication system?
The Traveling Wave Tube Amplifier (TWTA) is widely used as a power amplifier in satellite communication systems. It amplifies signals in the microwave frequency range and is capable of providing high power output with low noise and distortion. TWTA technology has been utilized for several decades in satellite communication due to its reliable performance and efficiency.
What type of microwave tube amplifier used an axial magnetic field and radial magnetic field?
That would be a TWT amplifier (traveling wave tube).
Is it safe to use radial tube with non-radial tire?
You can use a radial tube in a bias ply tire BUT you can not use a bias tube in a radial tire. The sidewall flex of a radial tire is greater than that of a bias ply. A bias tube cannot flex as rapidly as a radial tube and so the resulting friction or rubbing create too much heat and the tire/tube combination will blow.
What is a tube amplifier best adapted for?
Tube amplifiers are suitable for amplifying guitars, high-power radio and UHF television transmission, audiophile stereo transmission, and satellite transponders (such as those used in GPS).
What is an audion tube?
An audion tube is an electric amplifier device invented in 1906, as the forerunner of the triode.
What is a tube guitar amp?
A tube guitar amplifier basically is a large speaker which contains tubes inside the amplifier box for guitar use. Some are vintage and some are classic.
When was the 1st amplifier made?
the first amplifier was made in the year 1909. this was the audio amplifier of vacuum tube type.
What is the difference between vacuum tubes and transistors?
A vacuum tube is a current amplifier where the transistor amplifies voltageA tube is a voltage amplifier. A transistor is a current amplifier. A tube is an older design that requires substantial voltage to operate correctly. A transistor is a semiconductor device that operates on relatively low voltage.
How do you build a powerful amplifier?
First you need a design. Usually that is in the form of a schematic circuit diagram. You can copy an old design or there are books with examples or even the theory so you could learn to design your own. To actually build it, most tube power amps are built on a metal chassis, so you need to be able to work metal, especially bending and cutting holes for mounting tube sockets. The wiring is usually point-to-point soldering between tube sockets, so you need soldering equipment and skill. You also have to consider getting parts. Many amplifier tubes are still made, but not all are easy to find or cheap. And the output Transformers can be hard to find and expensive. Tube amplifiers use high voltages that can be dangerous or even deadly, so you need to understand the risks and how to build and test safely.
