300B
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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 Template:Cvt high and Template:Cvt wide, and the anode can dissipate 40 watts thermal. In the 1980s it began to be used increasingly by audiophiles in home audio equipment. The 300B has good linearity, low noise and good reliability; it is often used in single-ended triode (SET) audio amplifiers of about eight watts output. A push–pull pair can output 20 watts.
As of 2022[update] manufacturers of 300B and other tubes of similar characteristics included EkspoPUL[1] (Electro Harmonix[2] brand), ELROG,[3] Emission Labs - EML,[4] JJ Electronic,[5] KR Audio,[6] TJ FullMusic,[7] Hengyang Electronics[8] (Psvane brand), Linlai,[9] Takatsuki Electric[10] and Western Electric.[11] Prices for new 300B tubes ranged from US$175 to $2,000 per matched pair.
Western Electric (tube manufacturer), a small, privately owned company in Rossville, Georgia resumed production of the original 300B in 2018 using the original, 1938 manufacturing standards on a modernized assembly line housed at the Rossville Works.[11]
See also
References
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- ^ itWeek 17.6.2003, 50 years of Reflektor Saratov, Page Module:Citation/CS1/styles.css has no content."itWeek".
- ^ EH 300B,Page Module:Citation/CS1/styles.css has no content."New Sensor Corp".
- ^ ER300B,Page Module:Citation/CS1/styles.css has no content."Deutsche Elektronenröhren Manufaktur GmbH".
- ^ EML300B,Page Module:Citation/CS1/styles.css has no content."Emission Labs".
- ^ JJ 300B,Page Module:Citation/CS1/styles.css has no content."JJ Electronics s.r.o".
- ^ KR Vacuum Tubes,Page Module:Citation/CS1/styles.css has no content."KR Audio Electronics sro".
- ^ Full Music 300B,Page Module:Citation/CS1/styles.css has no content."Tianjin Quanzheng Electron Tube Technology Co., Ltd".
- ^ Legend Series 300B,Page Module:Citation/CS1/styles.css has no content."Changsha Hengyang Electronics Co., Ltd".
- ^ Linlai WE Replica 300B,Page Module:Citation/CS1/styles.css has no content."LinlaiGlobal".Page Module:Citation/CS1/styles.css has no content."Changsha Qiangsheng Light Power Co., Ltd".
- ^ TA-300B,Page Module:Citation/CS1/styles.css has no content."Takatsuki Electric Industrial Co. Ltd".
- ^ a b Page Module:Citation/CS1/styles.css has no content."300b Vacuum Tube". Western Electric Export Corporation. Retrieved December 9, 2023.
