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Tube sound (or valve sound) is the characteristic sound associated with a vacuum tube amplifier (valve amplifier in British English), a vacuum tube-based audio amplifier. [1] At first, the concept of tube sound did not exist, because practically all electronic amplification of audio signals was done with vacuum tubes and other comparable ...
VR – Amplifier tube; ... 1A6, with double the heater power and double the frequency range; ... 2A3 – Directly heated power triode, ...
For the EF86 low-noise audio pentode valve, for example, this voltage noise is specified (see e.g., the Valvo, Telefunken or Philips data sheets) as 2 microvolts integrated over a frequency range of approximately 25 Hz to 10 kHz. (This refers to the integrated noise, see below for the frequency dependence of the noise spectral density.)
A valve amplifier or tube amplifier is a type of electronic amplifier that uses vacuum tubes to increase the amplitude or power of a signal. Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers in the 1960s and 1970s.
A valve RF amplifier (UK and Aus.) or tube amplifier is a device for electrically amplifying the power of an electrical radio frequency signal. Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers during the 1960s and 1970s, initially for receivers and low power stages of ...
A SET tube audio amplifier. A single-ended triode (SET) is a vacuum tube electronic amplifier that uses a single triode to produce an output, in contrast to a push-pull amplifier which uses a pair of devices with antiphase inputs to generate an output with the wanted signals added and the distortion components subtracted.
The 6550 is a beam power tube designed by Tung-Sol for application as an audio frequency power amplifier and introduced in 1954. [136] [137] Tung-Sol literature refers to the 6550 variously as a beam power amplifier, power pentode and beam pentode, with the latter two names viewing the beam confining structure as a fifth electrode. The plate ...
Frequency range: 10-20000 Hz at ±0.2 dB; 3-60000 Hz at ±3 dB; [58] Phase shift within 10-20000 Hz: "never exceeds a few degrees" at the extremes of audio spectrum; [ 58 ] Noise and hum : -85 dB below maximum output, almost entirely consisting of mains frequency hum.