4只曙光300B型号是一致的 (放大器是Audio Space AS-6i 300B,
http://www.audiospace.com.hk/detail.asp?subcatid=0&private=&catid=6083&PageNo=9&PageSize=1) , 现在我想用两种天津的300B (300B/n and 300B/c/+)
(300B/n
Filament voltage…………………………………………………………5 V* or 2.5V*
Nominal filament current………………………………………………1.2A or 2.5A
Plate voltage…………………………………………………………………300V
Grid voltage…………………………………………………………………-58 V**
Plate current…………………………………………………………………60 mA
Amplification factor…………………………………………………………3.85
Grid to plate transconductance …………………………………………5700 micromhos
Grid current………………………………………………………………… 0.05 μA
Plate resistance………………………………………………………………700 ohms
300B/c/+
Filament voltage………………………………………………………………5 V*
Nominal filament current……………………………………………………2.4A
Plate voltage…………………………………………………………………400V
Grid voltage…………………………………………………………………-70 V**
Plate current…………………………………………………………………120 mA
Amplification factor…………………………………………………………3.85
Grid to plate transconductance …………………………………………8500 micromhos
Grid current………………………………………………………………… 0.05 μA
Plate resistance………………………………………………………………450 ohms
Load resistance………………………………………………………………2.0 kohms
谢谢