FuzzDog Bionic GuzzFun, Manual, Page: 2 / 9

Schematic
BOM
R1 910K
R2 180K
R3 910K
R4 910K
R5 10K
R6 180K
R7 4M7
R8 910K
R9 750R
C1 100n
C2 10n
C3 470p
C4 4.7u
C5 4.7u
C6 100n
C7 330n
S1-3 SPDT
Q1,2* 2N5089
Q3* 2N5306
DENS 100KB
FUZZ 10KB
FILT 10KB
BIAS 50KB
VOL 100KA
*The stock transistors give highly variable, very gated results, which may not
be to everyone’s taste. That’s all part of the charm of this box. However, if you
want to make it a bit more ‘normal’ you can try subbing some other stuff in
there. 2N5088 work well in Q1-2, and other medium gain NPN cans may offer
good results. A lower gain darlington for Q3 will tame things a bit. MPSA13
worked well in reducing the gating, but the legs will need twisting. See later in
the doc for details.
The optional alternatives supplied with the kit are MPSA06, which have the
same pinout as 2N5089, and BC517 which is different to the 2N5306 - see over.