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Fuzz Face Bias Resistors Calculator

R1   K

R2   K

R3   K

R4   K

Vcc  V

Q1:

hFE 

Vbe  V

iL   mA

Q2:

hFE 

Vbe  V

iL   mA

Vc1  V

Vc2  V

ic1  mA

ic2  mA

ib1  mA

ib2  mA

ie1  mA

ie2  mA

i1   mA

i3   mA

V4   V

Ve2  V

Use this page to estimate the bias resistors of a Fuzz Face circuit.
Calculation includes the effect of germanium transistors leakage current in mA, iL text field. For silicon transistors use iL = 0.
Vc2 and Vc1 values are very sensitive to small changes in hFE and iL, therefore precise readings are required to estimate variables with reasonable accuracy.
If nothing is showed after clicking the Fuzz button then click on the result fields or click Reset.

Original Windows, Mac OS 9 and Mac OSX stand-alone software available here