The warm, rich sound of valve guitar amplifiers

  title={The warm, rich sound of valve guitar amplifiers},
  author={David D. Keeports},
  journal={Physics Education},
  • D. Keeports
  • Published 9 February 2017
  • Physics
  • Physics Education
Practical solid state diodes and transistors have made glass valve technology nearly obsolete. Nevertheless, valves survive largely because electric guitar players much prefer the sound of valve amplifiers to the sound of transistor amplifiers. This paper discusses the introductory-level physics behind that preference. Overdriving an amplifier adds harmonics to an input sound. While a moderately overdriven valve amplifier produces strong even harmonics that enhance a sound, an overdriven… 

Using Transistors to Emulate Vacuum Tube Sound Quality Based on Asymmetric Cycle Harmonic Injection Method

  • Jerry Chun-Fung Li
  • Physics
    2019 IEEE 8th Global Conference on Consumer Electronics (GCCE)
  • 2019
A novel analog method to change the harmonic contents of a signal is described and a transistor amplifier with controllable output harmonics has been built.

Guitar Sounds: From Wood Vibrations to a Mini Power Plant

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A collection of demonstrations, most of which require only a computer, a set of speakers, and a projector, are described.

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