Akashic Guitar effects circuit lookup
GAINTONEVOL

1590B · 3 knobs

delyk PCBs

El Rey de la Gloria Azul II

Based on the Marshall Bluesbreaker· 19 other boards clone it

Category
Overdrive
Controls
Gain · Tone · Vol
Difficulty
Medium
Price
see vendorout of stock
Buy the PCB at delyk PCBs Build document

From the vendor

The Marshall Blues Breaker was a pedal introduced in 1991 with the purpose of simulating a vintage Marshall combo amp used by Eric Clapton. The pedal itself doesn’t produce much gain, but the way that it pushes the tubes brings out some amazing tones. JHS and Analogman used the Blues Breaker circuit as a basis for their own variants.

Schematic

The schematic is in the vendor's build document, page 8. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 32 rows

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Variant

ocr read from an image · sch paired from the schematic · fixed corrected by hand. Check marked values against the build document.

RefValueNormalizedTypeNotes
Resistors 12
RPD1Mfixed1M1M to 2M2
R11Mfixed1M
R23k3fixed3.3k
R34k7fixed4.7k
R410kfixed10k
R5220kfixed220k
R66k8fixed6.8k
R71kfixed1k
R86k8fixed6.8k
R91Mfixed1M
R1047kfixed47k
R1147kfixed47k
Capacitors 10
C110nFfixed10n
C247pFfixed47p
C310nFfixed10n
C410nFfixed10n
C5100nFfixed100n
C610nFfixed10n
C710nFfixed10n
C8100nFfixed100n
C10100uFfixed100u
C11100uFfixed100u
Diodes 5
D11N914fixed1N914
D21N914fixed1N914
D31N914fixed1N914
D41N914fixed1N914
D111N4001fixed1N4001polarity protection; any 1N400x
ICs 1
IC1TL072fixedTL072
Potentiometers 3
GainB100kfixedB100kPotentiometer
ToneB25kfixedB25kPotentiometer
VolA100kfixedA100kPotentiometer
Trimmers 1
Pres50kfixed50ktrimpot

Other boards based on the Marshall Bluesbreaker