just a short question regarding the 6550 =C= and bias

[petereanima]

the tech-corner says to bias to 80-100 mA/pair, i just received a new sextett and they all got a label on the packaging saying "30 mA" - i'm a bit confused right now.

btw: the tubes are from BTB Germany, if that helps.

 

[Peter Diezel]

They have 30 mA in their test machine.

Bias depends on voltage of the power amp
and power of the tube.

Please go to 80 mA each pair minimum.

 

[petereanima]

Danke Chef!