125B · 3 knobs

Bass Brutalist

Based on the God City Instruments Brutalist Jr· 1 other board clones it

Category: Bass
Controls: Dist · Tone · Level
Price: $10.00in stock

Buy the PCB at God City Instruments Build document

From the vendor

Bass version of Brutalist Jr.

GCI Bass Brutalist is a new interpretation of the Brutalist Jr. circuit redesigned specifically for bass. This bass version uses LEDs for clipping and a modified FX-10 style tone stack with a wide range of tonal adjustment from bright and clanky to deep and smooth.

Sale is for PCB only. You must source the components and build the pedal yourself. To make foot switch wiring easier, we also suggest you buy the 3pdt utility switch.

Build documentation can be found here below. Please read before purchasing.

Bass Brutalist Build Guide

Share your work, get tips, ask questions and help troubleshoot at our Facebook Group. Don't forget to agree to the group rules if you wish to join. GCI DIY PCB builders group

NOT FOR COMMERCIAL USE

Schematic

The schematic is in the vendor's build document. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 47 rows

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Ref	Value	Normalized	Type	Notes
Resistors 17
CLR	4.7k	4.7k	1/4 watt resistor
R1	2.2M	2.2M	1/4 watt resistor
R2	10k	10k	1/4 watt resistor
R3	2.2M	2.2M	1/4 watt resistor
R4	10k	10k	1/4 watt resistor 1k-22k Affects firs	t stage HPF 2 and gain
R5	33k	33k	1/4 watt resistor 22k-68k Affects firs	t stage HPF 1 and gain
R6	120k	120k	1/4 watt resistor 82k-220k Affects firs	t gain stage. More is more
R7	2.7k	2.7k	1/4 watt resistor 1.5k-4.7k Affects gain	of second stage. Less is more
R8	47k	47k	1/4 watt resistor see build guilde Affects gain	of output stage
R9	120k	120k	1/4 watt resistor Affects gain	of output stage
R10	10k	10k	1/4 watt resistor
R11	10k	10k	1/4 watt resistor
R12	68k	68k	1/4 watt resistor
R13	2.2k	2.2k	1/4 watt resistor see build guilde
R14	3.3k	3.3k	1/4 watt resistor
R15	2.7k	2.7k	1/4 watt resistor 1k-10k Sets minimum	for gain pot
R16	1K	1k	1/4 watt resistor
Capacitors 15
C1	3.3n	3.3n	Film cap 1n - 4.7n Input LPF
C2	47n	47n	Film cap 10n-100n Input cap
C3	100u	100u	Electrolytic cap 47u-220u Power filter	ing
C4	22n	22n	Film cap 10n-47n First gain s	tage HPF 1
C5	0.1u	100n	Film cap 47n-220n First gain s	tage HPF 2
C6	220p	220p	MLCC 100p-470p First gain s	tage LPF
C7	1uF	1u	Film cap
C8	100p	100p	MLCC see build guilde LPF EQ stage	. 2.2n makes for 1kHz peak
C9	68n	68n	Film cap
C10	330p	330p	MLCC 100p-680p Second gain	stage LPF
C11	0.1u	100n	Film cap
C12	0.1u	100n	MLCC
C13	100u	100u	Electrolytic cap 47u-220u Power filter	ing
C14	22u	22u	Electrolytic cap see build guilde Tone cap - d	ark
C15	22n	22n	Film cap Tone cap - b	right
Diodes 1
D3	1n5818	1N5818	Schottky diode 1n4001, bat41 Any protecti	on diode suitable for 9v
ICs 2
IC1	OPA2134	OPA2134	Dual op amp NE5532, TLE2072, AD712 Pin compatib	le dual op amp
IC2	OP07	OP07	Single op amp LM308, LM741, TL071 Pin compatib	le single op amp
Potentiometers 3
DIST	A100K	A100k	16mm potentionmeter A50k, A250k Affects gain	of second stage
TONE	B100k	B100k	16mm potentionmeter
LEVEL	A100K	A100k	16mm potentionmeter A50k Output volum	e
Switches 1
S	PAD	PAD	Send to PCB
LEDs 5
D1	3mm LED	3MM LED	Red LED Yellow, green, MOSFET, diode Clipping dio	de
D2	3mm LED	3MM LED	Yellow LED Red, green, MOSFET, diode Clipping dio	de
LED	3mm LED	3MM LED	LEDs, all sizes
L+	PAD	PAD	LED+
L-	PAD	PAD	LED-
Other 3
R	PAD	PAD	Return from PCB
V	PAD	PAD	9v input
G	PAD	PAD	Ground

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