Vacuum Tube Circuit Design Guitar Amplifier Power Amps > bit.ly/1W6zwvU
For practical purposes the gridis similar to the gate of a field effect transistor although the physics are completely different. Negative feedback, which can be used to decrease the distortion of an amplifier, is felt by some people to sound inferior. When using a power attenuator with a tube amplifier, the master volume no longer acts as the master volume control. The relationship between current flow and plate and grid voltage is often represented as a series of "characteristic curves" on a diagram. Many of the new audiofile super expensive gold wire amps would loose to an ebay $250 vintage tube amp.
For information on amps for bass guitar, see the article on bass amps. Like a single-stage transistor amplifier the output is inverted, arising voltage at the grid results in a falling voltage at the plate. PLEASE NOTE: some older hi-fi and guitar amplifiers, and a very few modern amplifiers, use special tubes that DEPEND on ionized gas for their normal operation. A wide range of instrument amplifiers is available, some for general purposes and others designed for specific instruments or particular sounds. Post World War II, the majority of valve power amplifiers are of the Class AB-1 "push pull" ultralinear topology, or lower cost single ended i.e. then if you then want to try to explain it yourself from another angle or using your own words/interpretation/whatever, its clear that its a different speaker. Report comment John says: June 4, 2014 at 2:42 pm That article is hilarious. (Regular tetrodes are rarely used for audio applications because of an effect called "tetrode kink", caused by that secondary emission. Very early in my career I worked as an engineer in industrial electronics and I recall that I could make almost anything I needed with a 12AU7, 12AX7 and/or a relay. If you cannot get your own tube tester, speak to a service technician for his recommendations.
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