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1590B · 3 knobs

Fuzz Dog· Repeater

Repeater - Vox Repeat Percussion

Based on the Vox Repeat Percussion· 1 other board clones it

Category
Wah / Envelope· Delay/Mod/Filter
Controls
Depth · Rate · Vol
Difficulty
Medium
Price
£39.60
Tags
delay-mod-filter

From the vendor

Instant Spacemen 3! Just add fuzz and wah.

Quirky little box of fun. The original was a box that plugged straight into the guitar jack socket. Sound? A reverse-sawtooth tremolo-type affair. Very choppy.

Stock, it cuts the signal completely between 'beats', giving the percussion effect the name suggests. This version has an optional depth knob to tame that chop and give a wider range of effect. It has also been updated for more output, and has an internal volume trimmer to set it to unity (or over, or under, as you wish).

Also added is a switch to change the speed range available. At higher speeds it sounds almost ring-mod-ish. Also included is an extra input capacitor so you can go with the original thin tone or a normal, full range tone.

Kit comes with a tested 2N2646 (the UJT transistor that does the magic).

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: Vox Repeat Percussion

Difficulty: Medium

PCB size: 50 x 25mm

Knobs required: 2

Enclosure: 1590B

Direct-Connect compatible (4-way)

Download the INSTRUCTION PDF

Here's the doc for Version 4 since we still have some stock of the PCBs.

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 22 rows

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RefValueNormalizedTypeNotes
Resistors 12
R122K22k
R21M1M
R3330K330k
R433K33k
R51K51.5k
R61M1M
R7330K330k
R84K74.7k
R982K82k
R111K1k
R12470R470
R14330K330k
Capacitors 5
C2100n100n
C368n68n
C4100u100uElectrolytic capacitor
C510u10uElectrolytic capacitor
C62u22.2uElectrolytic capacitor
Transistors 2
Q1-2MPSA18**MPSA18
Q32N26462N2646
Potentiometers 3
DEPTH500KCC500k
RATE100KCC100k
VOL47-50K Trim47-50K TRIM

Other boards based on the Vox Repeat Percussion