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What is tube?A water-pipe commonly referred to as a bong. "Let's rip tubes after class." tube - meme giftube - videoTube - what is it?OK, I just want to clear up the previous definition for an Electron Tube (the type used in guitar amps and high-end audio applications). The fella before me said tubes convert heat into electricity, this just goes to show that a little knowledge is a dangerous thing. Tubes do have a heater element, but this is seperate from any signal processing the tube performs. Tubes have anywhere from 3 to 5 elemets inside, not including the heater. The first is called a Plate, this is a metal plate with a given DC voltage applied to it, usually 200 to 400 volts. Another part is called the Cathode, this is connected to ground, sometimes through a resistor or capacitor network. The voltage "wants" to flow from the plate to the cathode, but between them is a "grid." The grid is connected to the input signal and as the signal changes from a positive charge to a negative charge (all musical signals are AC current, oscillating between + and -)it allows more or less of the plate voltage to flow to the cathode, resulting in a large voltage swing on the plate in time with the input signal: the amplified signal. The other elements go between the grid and the plate and serve to make the tube more efficient, these "screens" as well as the grid can be biased, that is, they have a fixed voltage applied to them to more carefully control how much current flows through the tube. Overbiased tubes will blow out because there is too much current flowing from the plate to the cathode, while under-biased tubes will have low output and sound thin, bitch. What does "tube" mean?Short for Vacuum Tube, a device used to drive amplifiers until the advent of transistors. A tube works like a flood gate, except with heat. A small heater in the base warms up, while a gate like mechanism opens and closes depending on the input signal. As heat goes through the "gate", it is turned into electrical energy. Tube slots must be biased, which determines the voltages seen by the tube. Only guitar amps still use tubes (as well as some bass amps, mic preamps, and other pro audio devices.) The Ampeg STV had a whopping six 6550 tubes, producing 300w @4 ohms!" Tube - what does it mean?A person that has no idea how to converse with another human. Soemone that has a brain deficency. "did you understand a word that guy said?" Tube - meaningA Tube is a video site with embeded Flash or HTML5 videos. Youtube is on of the best known Tube sites or Tubes. Tube - definition1. A round, cylindical object. 1. "Pass me a tube of loo-roll." Tube - slangNoun: A derisive and/or derogatory term for a Woman's vagina. Dahveed: "Yo Emy, why'd you break-up with Jackie?" TubeI feel like watching the tube Tubelondon underground/metro/subway fuck the tube, I have a car. TubeIdiot, innocent fool -- particularly a teenager. "See him he's a pure tube man !" |
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