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300B dimensions in mm In electronics , the 300B is a directly-heated power triode vacuum tube with a four-pin base, introduced in 1938 by Western Electric to amplify telephone signals. It measures 6.4 in (16 cm) high and 2.4 in (6.1 cm) wide, and the anode can dissipate 40 watts thermal.
The Williamson amplifier is a four-stage, push-pull, ... The best theatre amplifiers, built by Western Electric around their 300A and 300B power triodes, ...
The cascode (a contraction of the phrase cascade to cathode) is a two-stage amplifier composed of a transconductance amplifier followed by a current buffer. In valve circuits, the cascode is often constructed from two triodes connected in series, with one operating as a common grid and thus acting as a voltage regulator , providing a nearly ...
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.
An example of a typical high-end stereo preamplifier.. A preamplifier, also known as a preamp, is an electronic amplifier that converts a weak electrical signal into an output signal strong enough to be noise-tolerant and strong enough for further processing, or for sending to a power amplifier and a loudspeaker. [1]
Boulder Amplifiers is a private corporation founded in Boulder, Colorado in 1983 by Jeff Nelson as a manufacturer of high-end, solid state professional audio electronics.. The early, primary technology used to distinguish Boulder from other audio manufacturers was the use of the 990 discrete gain stage, based on the original work of Deane Jensen.