This calculator will help estimate the bias resistors for the Big Muff Pi.

The calculator includes the effect of germanium transistors leakage current in mA (the iL text field). For silicon transistors use a value of 0 of iL. Precise values are necessary to estimate variables with reasonable accuracy. Results are very sensitive to small changes in hFE and iL.


R    K
Re   K
R1   K
R2   K
Vcc  V
Vbe  V
iL   mA


Vc   V
Vb   V
Ve   V
ic   mA
ib   mA
ie   mA
i1   mA
i2   mA
i    mA


bmp gain stage


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