Adam's Amplifiers: Triode Calculator
Wednesday January 4, 2006

The equations for this circuit are taken from Randall Aiken's:
"Designing Common-Cathode Amplifiers"

Tube Data


Choose from the menu at right to fill in Ra and mu values for some common triodes.

  Bypassed Unbypassed
Voltage Gain
Decibel Gain
Ra (internal plate resistance) Plate Output Impedance
mu (amplification factor) Cathode Output Impedance

Circuit Data Schematic
Rp (plate resistor)

Rg (grid load)
Rl (following stage impedance)
Rk (cathode resistor)