Akashic Guitar effects circuit lookup
VOL

1590B · 1 knob

Fuzz Dog· Doomed

We're Doomed!

Based on the Audio Surplus Effects OK Doomer· 5 other boards clone it

Category
Fuzz
Controls
Vol
Difficulty
Medium
Price
£30.00
Tags
fuzz

From the vendor

Massive, blown-out, amp-smashing distortion from the depths of Valhalla.

OK, so all hyperboly aside, it's essentially a Big Muff with no clipping diodes and a simple treble bleed at the output instead of a tone section. Sounds great though.

The original is a one-knob affair, with the INPUT and FILTER controls as internal trimmers. How annoying is that? We've gone for a three-knob approach as we know y'all like to tinker on the fly. If you want it one knob as the original you're going to have to hack in trimmers and wire up the volume pot. If there's enough demand we may re-do the PCB to have it either way, but for now...

The kit is supplied with vertical-mount pots which have round shafts, so you'll need set-screw fitting knobs.

If you want the PCB without parts there's a link for that at the bottom of the page.

Partial kit: PCB, all board-mounted components, pots.

Full kit: As above, plus footswitch and appropriate daughterboard/components for your selected bypass type (see Downloads section for details of those), jack sockets, DC socket, battery snap, hook-up wire, LED.

Enclosure (pre-drilled) is available as an option with full kits, and will not take a battery. Knobs are not included.

Builds are only available with full kits including enclosures. Please choose appropriate knobs.

Inspired by: OK Doomer

Difficulty: Medium

PCB size: 50 x 32mm

Knobs required: 3

Enclosure: 1590B

Direct-Connect compatible (4-way)

Download the INSTRUCTION PDF

Schematic

The schematic is in the vendor's build document, page 3. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 39 rows

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Got parts in a drawer? See what you can build with them.

RefValueNormalizedTypeNotes
Resistors 22
R11M1M
R21K51.5k
R3100K100k
R4390R390
R5470K470k
R615K15k
R77K57.5k
R8100K100k
R9100R100
R10470K470k
R1115K15k
R127K57.5k
R13100K100k
R14390R390
R15470K470k
R1615K15k
R17430K430k
R18100K100k
R1910K10k
R201K1k
R212K22.2k
R22100R100
Capacitors 11
C1820n820n
C2470p470p
C368n68n
C4470p470p
C582n82n
C682n82n
C73n33.3n
C847n47n
C9820n820n
C10100n100n
C11100u100uelec
Diodes 1
D11N58171N5817
Transistors 4
Q1MPSA18MPSA18
Q2MPSA18MPSA18
Q3MPSA18MPSA18
Q4MPSA18MPSA18
Potentiometers 1
VOL100KBB100kPotentiometer

Other boards based on the Audio Surplus Effects OK Doomer