Akashic Guitar effects circuit lookup
GAINBASSTREBLESUB BASSVOLUME

Enclosure not stated · 5 knobs

Tagboard Effects

Barber Dirty BombVerified

Based on the Barber Dirty Bomb· 3 other boards clone it

Category
Distortion
Controls
Gain · Bass · Treble · Sub Bass · Volume
Build
Vero· 19×19· 27 cuts, 11 links
Layout
Verified · Tagboard Effects marks it as built and working
Tags
Barber, Distortion, Overdrive

From the post

This is a great sounding effect by Dave Barber, modified to put the Sub Bass pot external. Dave sells effects at great prices and their build quality is second to none, so this is one of those builders that everyone should support where possible. So if you get an opportunity to buy any of his other effects at any time then do it, you won't be disappointed.

Info about the original:

Extremely versatile, high gain distortion, provides wider range of stellar tones.

From ultra chunky, to scooped and back to thick again.

Toggle switch selects mid range character for three distinct modes.

Sweet and powerful Vintage two band E.Q.

Internal adjustable Bass Boost for powerful sub frequencies.

True bypass footswitch delivers clarity when bypassed.

All hand wired in the USA, traditional award winning Barber layout and wiring.

Cascading FET circuit, with MOSFET distortion for incredibly realistic tube quality sounds.

BOM:

Group Name

Quantity

Resistors 91R

1

Resistors 1K

2

Resistors 2K2

1

Resistors 3K

1

Resistors 10K

6

Resistors 13K3

1

Resistors 91K

1

Resistors 100K

3

Resistors 220K

1

Resistors 470K

1

Resistors 820K

1

Resistors 1M

2

Resistors 2M2

1

Capacitors 100p

1

Capacitors 120p

1

Capacitors 1n

3

Capacitors 3n3

1

Capacitors 3n9

2

Capacitors 10n

2

Capacitors 56n

2

Capacitors 100n

1

Capacitors 220n

1

Capacitors 330n

1

Capacitors 2u2

1

Capacitors 47u

1

Capacitors 100u

3

Diodes 1N4148

2

Transistors 2N7000

2

IC TL072

2

Schematic

This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.

Parts list 37 rows

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Check before you build · 2 values the reader of this layout was not sure of
  • 13K3 right of the lower IC: printed clearly, unusual value
  • 3K right of the 13K3: printed clearly, unusual value
RefValueNormalizedTypeNotes
Resistors 13
×610K10kread from the layout by eye
×3100K100kread from the layout by eye
×21M1Mread from the layout by eye
×21K1kread from the layout by eye
×12K22.2kread from the layout by eye
×1820K820kread from the layout by eye
×191K91kread from the layout by eye
×12M22.2Mread from the layout by eye
×1220K220kread from the layout by eye
×191R91read from the layout by eye
×1470K470kread from the layout by eye
×113K313.3kread from the layout by eye
×13K3kread from the layout by eye
Capacitors 13
×1100p100pread from the layout by eye
×1120p120pread from the layout by eye
×31n1nread from the layout by eye
×13n33.3nread from the layout by eye
×23n93.9none on the board, one on the Mid Range switch; read from the layout by eye
×210n10none on the board, one on the Mid Range switch; read from the layout by eye
×256n56nread from the layout by eye
×1100n100nread from the layout by eye
×1220n220nread from the layout by eye
×1330n330nread from the layout by eye
×12u22.2uelectrolytic; read from the layout by eye
×147u47uelectrolytic; read from the layout by eye
×3100u100uelectrolytic; read from the layout by eye
Diodes 2
D11N41481N4148read from the layout by eye
D21N41481N4148read from the layout by eye
Transistors 2
Q12N70002N7000MOSFET; read from the layout by eye
Q22N70002N7000MOSFET; read from the layout by eye
ICs 1
×2TL072TL072read from the layout by eye
Potentiometers 5
GainB100KB100kPotentiometerread from the layout by eye
BassB1MB1MPotentiometerread from the layout by eye
TrebleA1MA1MPotentiometerread from the layout by eye
Sub BassA50KA50kPotentiometerread from the layout by eye
VolumeA100KA100kPotentiometerread from the layout by eye
Switches 1
Mid RangeSPDT on/off/onSPDT ON/OFF/ONtoggle, 3 position; carries the 3n9 and 10n; read from the layout by eye

Other boards based on the Barber Dirty Bomb