Akashic Guitar effects PCB lookup
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1590B

Fuzz Dog· fuzztwist

Fuzzy Twist

Based on the Fuzz Bender

Category
Fuzz
Difficulty
Easy
Price
£39.60
Tags
fuzz

From the vendor

An utter beast of a take on a hybrid Tone Bender.

Fronted by a pair of silicon cans, but backed up by the all important germanium funkiness to bring you the sweetest of smooth fuzz. Unless of course you want it nasty, in which case this also has your back, thanks to the external bias pot.

Yeah, we've heard it all before. Sure, but how about you mash in a little bit of HM-2? Well, not really, but the special sauce in this hot take is the active gyrator-based EQ, offering huge boost across your bass and treble ranges, rather than the usual frequency dumping of passive stacks.

So, smooth and classic or gated and glitchy - take your pick, then twist those dials and pick again. It's going to be a long night...

Now, we've taken a liberty with the bias control. The original uses a combination of log pot and parallel resistors to do exactly the same job as a linear pot of a lower value would do, so we're offering the choice of either until we run out of 250KA dual gang pots. It makes no difference in use, honestly. We're also offering it up without the germanium transistor, just in case you have something special tucked away for a rainy day you want to use.

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 can take a battery if desired with footswitch positioned 22mm higher, closer to the controls. Knobs are not included.

Inspired by: Fuzz Bender

Difficulty: Easy

PCB size: 50 x 50mm

Knobs required: 5

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 43 rows

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RefValueNormalizedTypeNotes
Resistors 21
R11M1M
R247K47k
R3220K220k
R410K10k
R53K33.3k
R610K10k
R71K1k
R84K74.7k
R1010K10k
R1147K47k
R1247K47k
R1310K10k
R1410K10k
R16100R100
R1710K10k
R1810K10k
R1922K22k
R202K42.4k
R212K42.4k
R22100K100k
R2322K22k
Capacitors 16
C1100n100n
C2220p220p
C3220n220n
C4500p500p
C52n22.2n
C6100n100n
C7100n100n
C86n86.8n
C9220n220n
C1047n47n
C11100p100p
C121u1u
C1310u10uelec
C14100u100uelec
C1510u10uelec
C16100u100uelec
Diodes 2
D11N58171N5817
D2BAT46/GeBAT46/GE
Transistors 3
Q12N50882N5088
Q22N50882N5088
Q3NPNNPN
ICs 1
IC37660SEPA7660SEPA