Akashic Guitar effects PCB lookup
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1590BB2

Sheepylove· PCB056

DayJ

Based on the Limetone Audio Jackal

Category
Distortion
Price
€15.00in stock
Tags
Distortion

From the vendor

This is a pedal with a lot of gain stages. It can do a bit, it's not the end-all for gain but it does well enough. You're going to get compression, low-end, and fun. It's lot of soldering and then you need to bias and adjust the internal trim pots. Finally, you can play with diodes to see if that makes a difference to you.

I labelled all the bias points with ~5V, but this is just a default. Similarly with the transistors, I used MMBFJ201 like the original, but other options are probably feasible. With the number of gain stages, you can play around a lot. Make 'em all hot, put a "cold clipper" in, craft the tone more to how you like it. The hard clipping diodes are LEDs in the original, but play around and see what works for you. I liked Ge and BAT42 when I tried them, cork sniffery at its best.

The internal trim pots are Resonance (low end), Presence (high end), and Balance (tone). Set the tone for your preference, then do the low-end and then presence.

It's a fun one, no exotic parts, just a lot of them. Take your time, make sure your solder flows, and enjoy yourself!

Uses a 1590BB2 enclosure.

Schematic

The schematic is in the vendor's build document, page 5. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 87 rows

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RefValueNormalizedTypeNotes
Resistors 28
R11M1M
R31M1M
R311M1M
R21k1k
R101k1k
R331k1k
R391k1k
R53k33.3k
R11220k220k
R13220k220k
R12100k100k
R16100k100k
R15220R220
R1733k33k
R20510k510k
R223k3k
R253k3k
R23560R560
R24820R820
R27100R100
R35100R100
R2810k10k
R2910k10k
R3047k47k
R4547k47k
R32470R470
R36470R470
R4468k68k
Capacitors 29
C1100n100n
C23100n100n
C21u1u
C81u1u
C191u1u
C201u1u
C34n74.7n
C51n51.5n
C710n10n
C915n15n
C1322n22n
C1422n22n
C1522n22n
C3422n22n
C3822n22n
C166n86.8n
C416n86.8n
C171u51.5u
C1847n47n
C2110u10u
C2510u10u
C3210u10u
C2247u47u
C2447u47u
C2647u47u
C27150n150n
C30680n680n
C311n1n
C372n22.2n
Diodes 3
D11N58171N5817
D21N58171N5817
D31N58171N5817
Transistors 6
Q1MMBFJ201MMBFJ201
Q2MMBFJ201MMBFJ201
Q3MMBFJ201MMBFJ201
Q4MMBFJ201MMBFJ201
Q5MMBFJ201MMBFJ201
Q6MMBFJ201MMBFJ201
ICs 4
U1TL072CPTL072CP
U2TL072CPTL072CP
U3TL072CPTL072CP
U4ICL7660SICL7660S
Potentiometers 10
RV1A1MA1M
RV2A1MA1M
RV3B25kB25k
RV4B250kB250k
RV5A100kA100k
RV625k25k15k on original
RV925k25k15k on original
RV1025k25k15k on original
RV725k25k18k on original
RV850k50k22k on original
Trimmers 3
T150k50k
T250k50k
T350k50k
Switches 1
SW5On/OnON/ON
LEDs 3
D4Red LEDRED LEDRed LED is in stock
D5Red LEDRED LEDRed LED is in stock unit, try anything!
D11RED_LEDRED_LED