Sch BOM
R1
1M
R2
100K
R3
100K
R4
680K
R5
4K7
R6
4K7
R7
470K
R8
33K
R9
100K
R10
470R
R11
470K
R12
10K
R13
10K
R14
100K
R15
100R
R16
470K
R17
10K
R18
10K
R19
100K
R20
100R
R21
470K
R22
15K
R23
100K
R24
100K
R25
10K
R26
470K
R27
2K2
R28
12K
R30
39K
R31
100K
C1
10n
C2
6n8
C3
470p
C4
470p
C5
100u
C6
470p
C7
100n
C8
100n
C9
10n
C10
100n
C11
470n
C12
470n
C13
2u2
C14
10u
C15
10u
C16
10u
C17
4n7
C18
1u
‡
D1-4
1N4148
Q1-5
C2240*
Q6
NPN Ge**
Q7
PNP Ge**
DIST
100KA Dual Gang
TONE
100KB
VOL
100KB
T1
22K trimmer***
SW1
DPDT ON-ON
*The original circuit uses
C2240, but you could try
other BJT. The circuit is
basically a Big Muff Pi.
C2240 have a non-
standard pin-out so there
are extra pads on the PCB
to accomodate those and
standard CBE cans. See
later in this document for
more info on that.
**NTE102/3 in the
original, but you can try
other germaniums. We
supply AC128/AC176
which work well. You
could replace these with
silicon if you prefer.
***10K in original but
we’ve made it bigger to
accommodate a wider
range of germaniums.
‡
Yes, C18 is shown as
470n in the cover pic.
We were all out of 1u
when we built it.
