e/300B

Information
has gloss	eng: The 300B is a directly heated power triode using a four pin base, introduced in 1937 to amplify telephone signals. It measures 6.4 inches high and 2.4 inches wide, and has a 40 watt anode dissipation. In the 1980s use of 300Bs by audiophiles had grown. The 300Bs used by these audiophiles were used home audio equipment. The 300B has high linearity, low noise and good reliability. It is often used in single-ended triode (SET) audio amplifiers. These SET amplifiers output about eight watts, while a push-pull pair of 300Bs can output 20 watts.
lexicalization	eng: 300B
instance of	(noun) electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope electron tube, tube, thermionic tube, vacuum tube, thermionic vacuum tube, thermionic valve