FuzzDog DeathDrive, Manual

Page: 3 / 16

R1 1M
R2 1K
R3 1M
R4 10K
R5 470K
R6 47K
R7 10K
R8 2K2
R9 22K
R10 10K
R11 100K
R12 100K
R13 47K
R14 47K
R15 10K
R16 1M
R17 1K
R18 470K
R19 470K
R20 470R
R21 10K
R22 1M
R23 10K
R24 10K
R25 1K
R26 560R
R27 47R
R28 1K
R29 1K5
R30 1M
R31 10K
C1 100p
C2 100n
C3 100n
C4 100n
C5 100n
C6 1u elec
C7 1u elec
C8 10u
C9 100p
C10 1u
‡
C11 22n
C12 1n
C13 33p
C14 100n
C15 100p
C16 4u7 elec
C17 2u2 elec
C18 4u7 elec
C19 1u elec
C20 3n3
C21 22n
C22 10u elec
C23 100u elec
IC1 OP07*
Q1 2N5457**
Q2 2N5089
Q3 2N5087
Q4 2N5089
Q5 2N5457**
Q6 BS170
D1-2 Ge***
D3 1N4148
D4 3mm Red LED
D5-7 1N4148
D8 1N4001
VOL 100KA
DIST 100KA
FILT 100KA
OCT 50KB
BOOS 100KA
S1 SPDT ON-OFF-ON
Schematic
+ BOM
*Original is LM308. Other single op-amps will work.
**Original is PF5102. Other N-channel FETs work in these buffer sections, and will have
very little or no impact on tone. Pads are included for through-hole or SMT FETs.
***We supply D9K which have the stipes at the anode rather than cathode. These don’t even
need to be germanium - 1N4148 work fine. They need to be matched for forward voltage.
These need to be reversed when placed in the PCB, i.e. cathode to square pad.
‡
C10 is 1u on the original. We haven’t allowed a large space for that on the PCB, so if you
want to use this value you’ll need a small format part, such as MLCC. There’s really no need
to have such a big value in there. Use anything from 100n - 1u.
Bigger, legible version
on next page.
Based on the trace
by Bugg