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樓主 |
發表於 2013-6-24 00:37
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我指新一代强國机都加大咗隻牛的氶受能力,就KT88 的工作電壓計,HEATER 扯多咗Ｄ, 由1.7 AMP 去到1.95, 在KT120 低偏壓 (用上KT88的BIAS) 上, 我是外行, 但在高低音上, 有人說是更好,更受控, 可以肯定的是,壽命更長.
所有AUDIO RESEACH 新机都是用上KT120. CARY 机所用的牛有成200%WORKLOAD保險. 也是可一試,
題外,以下作參考歴史:
AL1 Mother of all Audio Power PENTODES.
EL3n Smaller pre-type of EL34. Beautiful coke bottle glass, and perfect pentode inside. No NOS spotted, but good used tubes are cheap. Collector's item.
6L6 Low cost, reliable tube. Cheap and good beam tetrode, with some distortion though. Break through of the beam tetrode.
KT66 Better construction 6L6, made in UK . This is a beam tetrode. KT stands for "Kinkless Tetrode".
7581A Better construction 6L6, made in USA
5881 Better construction 6L6, made in USA
EL34 Real pentode Can do higher voltage. Works very nice in Class A also.
6550 larger 6L6
KT88 Upgrade of 6L6, designed by TUNG-SOL.This is a beam tetrode. KT stands for "Kinkless Tetrode"
KT90 Original idea by EI - Yugoslavia. This is modified EL519 which works like a KT88.
KT94, KT100 So called higher power KT88. Part numbers are abused by the Chinese. Can be anything from a KT88 to a 6550, with a larger glass bulb.
KT120 This tube is no KT88. It draws more heater current, and it has another operating point. The operating point being "not KT88" shows to me this was knocked together, by using existing tools. With dedicated tools, a real high power KT88 could be made, compatible to old versions.
EL509 Switching tube for TV deflection. Can do very high plate current peaks, can withstand extreme heat, also due to magnoval socket. Looks like a larger EL34, but linearity a a compromise as with all switching tubes.
EL156 Original audio tube. Something like very large EL34, but 10 pin socket
EL152 German army tube. Larger than EL34, but with army socket
GU-50 Russian army tube. Same as EL152, but yet another socket. Best and finest tube of this list. Strong a s tank.
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發表於 2013-6-23 09:12
