Akashic Guitar effects PCB lookup
DECAYRESSENSBIAS

1590B · 4 knobs

Fuzz Dog· 7Dwar

7 of Dwarves Auto Wah

Based on the Snow White Autowah

Category
Wah / Envelope· Delay/Mod/Filter
Controls
Decay · Res · Sens · Bias
Difficulty
Medium
Price
£37.20
Tags
delay-mod-filter

From the vendor

An updated and tweaked version of a 90's rackmount auto filter squeezed into a neat little 1590B package. We won't lie - it's a fiddly beast to work with, requiring some fine tuning of the Bias and Sensitivity controls to get it to work nicely with individual guitars, but the results are worth it when you get the settings nailed. You could see this as either a pain or a blessing, as it means you can get all kinds of responses from it to suit your playing style. It's almost an instrument in itself. Just as good on bass as it is on guitar. Once the above controls are tweaked, you have lots of scope for adjustment with Resonance and Decay settings. Several hours can easily be lost twiddling with different placing dynamics to explore the huge range of sounds you can get from this thing. 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. Inspired by: Snow White Autowah Difficulty: Medium PCB size: 50 x 50mm Knobs required: 4 Enclosure: 1590B Direct-Connect compatible (4-way) Download the INSTRUCTION PDF

Schematic

The schematic is in the vendor's build document, page 2. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 58 rows

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RefValueNormalizedTypeNotes
Resistors 31
R110K10k
R21M1M
R31M1M
R244M74.7M
R410K10k
R2547R47
R55K15.1k
R267K97.9k
R6330R330
R274K74.7k
R7330R330
R2847K47k
R84K74.7k
R2947K47k
R94K74.7k
R3047R47
R104K74.7k
R312K22.2k
R11330R330
R12330R330
R134K74.7k
R144K74.7k
R151K1k
R16100K100k
R1720K20k
R1820K20k
R1920K20k
R2010K10k
R2110K10k
R224M74.7M
R23330R330
Capacitors 12
C122n22n
C2220n220n
C31u1uelec
C422n22n
C522n22n
C61u1uelec
C768n68n
C88n28.2n
C9100n100n
C102u22.2uelec
C11100u100uelec
C12100n100n
Diodes 5
D11N41481N4148
D21N41481N4148
D31N41481N4148
D41N40011N4001
D51N40011N4001
Transistors 3
Q2BC550BC550
Q3BC550BC550
Q12N54572N5457
ICs 3
IC1LM13700LM13700
IC2LM324LM324
IC378L0578L05
Potentiometers 4
DECAY1MCC1MPotentiometer
RES50KBB50kPotentiometer
SENS100KBB100kPotentiometer
BIAS50KBB50kPotentiometer