What is "BIAS" for? / 較BIAS有什麼用呢?

Dear brothers,

I would like to ask why do we need to adjust "Bias" in our Tube Amps? Actually what is this "Bias"?

I got a tube that gives off a Bias Voltage reading of 51; whereas the recommended reading for my amp is just 35 (max.) No matter which Socket I put it or how I adjust it, it still gives around 50.

What could have gone wrong with this 6L6G Tube?

Chinese Version

各位大哥,

小弟唔明胆機上的BIAS其實是用來較什麼的. 我有一隻6L6G胆, 不論我插佢落去那個位或較BIAS, 佢都俾個讀數51, 而架機指引說明最大為35. 隻胆出了什麼問題呢? 係唔係唔要得?

DualXeon 兄,

真係唔好意思, 咁遲先覆到你. 這一段日子忙得很.

我架機無改過. 我相信係隻胆的問題, 換了一隻之後一切便正常了. 多謝你教識我多一樣嘢 ... :wink: