1590B · 1 knob
From the vendor
1967. What's that crazy new sound? It's... it's like there's another guitar playing the note an octave higher but it's way too precisely following.
Yep, it's the very first version of that much loved octave-up effect that was all over Jimi's sound.
It sounds pretty great on it's own, but stick it after a Fuzz Face and you'll never quit smiling.
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: Octavia
Difficulty: Medium
PCB size: 50 x 40mm
Knobs required: 2
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 41 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 21 | ||||
| R1 | 2M2 | 2.2M | ||
| R2 | 820K | 820k | ||
| R3 | 680K | 680k | ||
| R4 | 100K | 100k | ||
| R5 | 220R | 220 | ||
| R6 | 220R | 220 | ||
| R7 | 47K | 47k | ||
| R8 | 39K | 39k | ||
| R10 | 470K | 470k | ||
| R11 | 330K | 330k | ||
| R12 | 10K | 10k | ||
| R13 | 10K | 10k | ||
| R14 | 2M2 | 2.2M | ||
| R15 | 820K | 820k | ||
| R16 | 100K | 100k | ||
| R17 | 2M2 | 2.2M | ||
| R18 | 2M2 | 2.2M | ||
| R19 | 10K | 10k | ||
| R20 | 150K | 150k | ||
| R21 | 180K | 180k | ||
| R22 | 100R | 100 | ||
| Capacitors 12 | ||||
| C1 | 10n | 10n | ||
| C2 | 470p | 470p | ||
| C3 | 1n | 1n | ||
| C4 | 10n | 10n | ||
| C5 | 100n | 100n | ||
| C6 | 10n | 10n | ||
| C7 | 10n | 10n | ||
| C8 | 100n | 100n | ||
| C10 | 22u | 22u | elec | |
| C11 | 22u | 22u | elec | |
| C12 | 100u | 100u | elec | |
| C13 | 22u | 22u | elec | |
| Diodes 3 | ||||
| D2 | 1N4148 | 1N4148 | ||
| D3 | 1N4148 | 1N4148 | ||
| D1 | 1N5817 | 1N5817 | ||
| Transistors 4 | ||||
| Q2 | MPSA13 | MPSA13 | ||
| Q3 | MPSA13 | MPSA13 | ||
| Q4 | MPSA13 | MPSA13 | ||
| Q1 | 2N3906 | 2N3906 | ||
| Potentiometers 1 | ||||
| VOL | 1MA | A1M | Potentiometer | |
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