Akashic Guitar effects PCB lookup
BASSGAINLEVELMIDSTREBLE

1590BB · 5 knobs

PCB Guitar Mania

Ojo Dominatrix!

Based on the Okko Dominator MKII

Category
Distortion· Dynamic High gain Distortion
Controls
Bass · Gain · Level · Mids · Treble
Difficulty
XXXX
Price
€11.90out of stock

Heads up Builders widely report inconsistent quality from PCB Guitar Mania boards, and whether a given board works is a gamble. Read recent forum reports before ordering.

From the vendor

Project overview

This is the über-evil twin brother of the Ojo Diablo! Made to deliver the most extreme metal tones. It’s all there: massive gain, lightning speed attack, aggressive punch, super-tight low end, and clarity of chords through the entire gain range. The active 3-band EQ with and an additional Mid-range pot adds much more versatility than the original toggle.

This version does not feature the gate on board.

Introduction

There are always some pedal brands that somehow manage to fly under the radar of the gear nerds no matter what they offer sound-wise. Okko is one of them, barely knew outside of Germany but fully packed with the finest engineering and tones that just deliver your modern needs.

A built-in charge pump for more headroom. (Make sure your electrolytes can handle them) a super powerful EQ and Distortion with its own voice and powerful attack. I mean… You can imagine that I build quite a lot of drive pedals, but this one ended up on my board right after I put it in the enclosure. Not even needed an artwork on the 1590BB… Just had to play it.

The original unit has a toggle for the mids, and we replaced this with a potentiometer for the ultimate control over the – for guitar elementary – mids.

Side note, there is a 15v regulator that’s pretty tall. I would solder it on the very end of the build. Right after you drilled the enclosure, so you get an idea of the best angle. Don’t make the same mistake I did. I could barely fit it in the enclosure.

Controls

• Gain

• Volume

• Bass

• Mids

• Treble

• Mid-range

For further analysis on this circuit take a look at this thread on Free Stomp Boxes Forum.

For any technical questions regarding this build don’t forget to check out our Facebook Group and our forum at Free Stomp Boxes.

Ojo Dominatrix! 1.2v – Building Docs

Ojo Dominatrix! 1.1v – Building Docs

Ojo Dominatrix! – Building Docs

Ojo Dominatrix! – Drilling Template

Schematic

The schematic is in the vendor's build document, page 6. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 75 rows

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Resistors 38
R371M1M
R3851r51
R11M1M
R21M1M
R310K10k
R410K10k
R510K10k
R6470K470k
R7470K470k
R810K10k
R922K22k
R102K22.2k
R11100K100k
R1239k39k
R131K1k
R1410K10k
R1510K10k
R1615K15k
R171M1M
R1847K47k
R1910K10k
R2047K47k
R2147K47k
R2239K39k
R231K1k
R241M1M
R2510K10k
R2610K10k
R2710K10k
R282K22.2k
R29470r470
R307K57.5k
R3110K10k
R3210K10k
R331K1k
R34470K470k
R35330r330
R3610K10k
Capacitors 23
C122n22n
C36n86.8n
C4220n220n
C6100p100p
C7220n220n
C8100n100n
C10470p470p
C11220n220n
C1210n10n
C1351n51n
C142n22.2n
C15470n470n
C1722n22n
C1822n22n
C1922n22n
C20220n220n
C2168n68n
C221n1n
C23680n680n
C22.2u2.2u
C510u10u
C922u22u
C1622u22u
Diodes 4
D11N40011N4001
D21N40011N4001
D31N40011N4001
D43mm3MM
Transistors 2
Q1BF245a*BF245A
Q2BF245a*BF245A
ICs 3
IC1OPA2604CPOPA2604CP
IC2TL074TL074
IC3IC7660SCPAZIC7660SCPAZ
Potentiometers 5
BASSB10KB10kPotentiometer
GAINB100KB100kPotentiometer
LEVELA100KA100kPotentiometer
MIDSB25KB25kPotentiometer
TREBLEB25KB25kPotentiometer