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Bias

Calculates the quiescent bias current for Class A and Class AB vacuum tube amplifiers based on plate dissipation percentage, tube type multiplier, and plate voltage.

Inputs

Plate Dissipation Percentage(%)

Class AB typical values: 50, 56, 60, 70, 75. Class A typical values: 70, 80, 90, 95

Tube Type Multiplier

Numeric multiplier for the tube type (e.g. 6SL7GT=1, 12AX7=2, EL84=12, KT88=35, KT150=70)

Plate Voltage(V)

Plate voltage of the amplifier in volts

Results

Bias2800.0mAQuiescent bias current in milliamps

Bias2.8000AQuiescent bias current in amps