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Advanced Mastering Chain Tools and Techniques
Published in Evren Göknar, Major Label Mastering, 2020
Saturation is a type of gentle distortion that can add some vitality and dimensionality to a mix that is lifeless or contained-sounding. Saturation is a byproduct of overloading the input or output of analog equipment like tape machines, tube amplifiers, or console microphone preamplifiers to create harmonic distortion. The increased input amplitude exceeds the capacity of the electronics or analog circuit to cleanly pass the signal. This can result in a richer and warmer sound, up to a point … beyond which the mix will sound overly distorted.
A Peek into the Nano-World of Colloidal and Interfacial Phenomena
Published in Shintaro Furusaki, John Garside, L.S. Fan, The Expanding World of Chemical Engineering, 2019
In a sense, the application discussed in the previous section is almost “classical.” Colloids also hold a considerable potential for applications that are unusual in the classical sense. Most of us are familiar with imaging devices such as the picture tube in a television set. These tubes are bulky and consume large amounts of electrical power. There is, therefore, a large incentive to develop compact imaging devices, known as flat-panel devices, that are easily portable and have lower power requirements. (Displays based on liquid-crystal technology fall into this class.)
Applying Vacuum Tube Devices
Published in Jerry C. Whitaker, Power Vacuum Tubes, 2017
The most common method of applying low-frequency (typically audio) intelligence to a high-level amplitude-modulated amplifier is the class B push–pull system illustrated in Figure 5.6 [1]. The vacuum tubes used in such a circuit may be triodes, tetrodes, or pentodes. The output circuit includes a modulation transformer, audio coupling capacitor, and dc shunt feed inductor. The capacitor and shunt inductor network is used to prevent unbalanced dc from magnetizing the modulation transformer core, which would result in poor low-frequency performance. Advanced core materials and improved transformer design have permitted elimination of the coupling capacitor and the shunt reactor in modern systems. The direct current to the modulated RF amplifier anode, therefore, flows directly through the secondary of the modulation transformer.
Two-color pyrometer-based method for measuring temperature profiles and attenuation coefficients in a coal power plant
Published in Combustion Science and Technology, 2018
Milentije Lukovic, Milos Vicic, Zoran Popovic, Ljubisa Zekovic, Becko Kasalica, Ivan Belca
We presented a method for the measuring of the temperature profiles in the firebox of a coal-fired power plant. The method enables simultaneous determination of the temperature profiles and the attenuation coefficients in the pyrometer’s spectral range for three regimes of the mill load. Our results were verified by the simultaneous use of the Venturi pneumatic pyrometer. Furthermore, the calculated values for attenuation coefficients have a good correlation with the loading regimes. We have observed that the relative concentrations of the unburnt particles sampled by the extraction and the obtained attenuation coefficients follow the same trend. Therefore, our method could be potentially used for monitoring of the concentration of particles. Moreover, the information about the unburnt particles could enable the optimization of combustion processes. To summarize, the novel method described in this work enables measurements of the temperature distributions within the coal plant fireboxes utilizing less resources than the conventional methods. Simultaneously, the method provides additional information about the concentration of the particles in the flame. The perturbations of the temperature profiles due to the application of the presented method are commensurable to the perturbations of the conventional methods. In addition, calibration of two-color pyrometer is far simpler than calibration of the Venturi pneumatic or suction pyrometers. A relative drawback of the presented method is the fact that it is more suited for smaller fireboxes. Long tubes are inconvenient and hard to use due to the high thermomechanical strains. Also, measuring of the temperature profiles implies stable loading and the combustion regime without large oscillations in measured effective temperatures. This is sometimes difficult to attain because of the coal quality variability.