http://www.webervst.com/wwwboard/tubes/calcbias.htm
Bias Settings For Safe Plate Dissipation - Class AB 70% Class A 90%
Explain This
Class
AB
A
Tube Type
EL84
6K6GT
6V6
6V6GTA
6L6
6L6GC
6L6WGB
5881
EL34
5763
7189
7591
KT66
KT88
7027
6CA7
6BQ5
Plate Voltage
mA
Calculate Plate Dissipation based on Voltage and Current readings
Plate Voltage
Cathode current (milliamps)
Plate dissipation (Watts)