They generate different amplifier sounds based on digital models of various popular amplifiers. RF power amplifiers and CMOS RF circuits. For amplification, he uses Ampeg amplifiers and cabinets. High power audio amplifiers and rectifiers required larger envelopes to dissipate heat. Biasing and bias stability of transistor and FET amplifiers. Triodes are used for amplifiers and oscillators. Triodes continue to be used in certain high-power RF amplifiers and transmitters. They have potential uses in diode lasers, amplifiers, and biological sensors. Modern instruments use electronic sensors, amplifiers, and recording devices. Several radio amateurs have experimented with the possibilities of using VFDs as triode amplifiers. This induced DC voltage can degrade the precision of instrumentation amplifiers in particular. Black was working on reducing distortion in repeater amplifiers used for telephone transmission. Usually this involves using a circuit topology similar to that used in tube amplifiers. This situation is typical for over-driven transistor differential amplifiers and ECL gates. The first-generation repeaters remain among the most reliable vacuum tube amplifiers ever designed.