"The maximum current capability for Shuguang 274B mesh plate tube is 150mA, suitable for tube pre-amp and mono-block single ended and 2A3 mono-block single ended. We would recommend Shuguang 274B rigid plate tube replace for 300B or any valve amplifier which has 5U4/5Z3/5AR4. The maximum current capability for this 274B rigid plate tube is 150mA."
Will this work well in the ST-120? Any reports?