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LEVELDISTFILTERSUSTONEVOL

1590BB2 · 6 knobs

GuitarPCB

NostalgiTone Call of Cthulhu PCB Set

Category
Utility
Controls
Level · Dist · Filter · Sus · Tone · Vol
Price
$13.95in stock

From the vendor

The NostalgiTone Call of Cthulhu Dual Combo provides amazing Doom and Stoner tones. With added order switching it provides endless sonic possibilities for exploration.

Included with each Dual Combo purchase. – (2) Mainboards, (2) pin headers, (1) Dual wiring board.

Description

Introducing the NostalgiTone – Call of Cthulhu Dual Combo, a crushing Doom and Stoner–focused design built for players who want seismic low-end, saturated sustain, and apocalyptic riff power. This dual combo pairs two proven single circuits from the NostalgiTone lineup: the Doomstortion (inspired by the Rat) and the Harbinger Fuzz (inspired by the Big Muff Opamp), creating a massive tonal arsenal capable of everything from gritty doom dirt to thick, endlessly sustaining fuzz walls. A standout feature is the integrated order-switching, allowing you to place the circuits in either direction for dramatically different textures — from tight distortion feeding a wooly fuzz to huge fuzz tones pushing aggressive clipping in an instant.

Key Feature:

Built-in order switching for endless tonal possibilities, allowing reversal of the signal path using a “Stubby” or short bat switch.

PCB set only – Enclosure and components not included.

(Use a 3PDT On/On short shaft / stubby switch for order switching)

LDR Phaser sets are also available!

Designed for a 1590BB2 enclosure, featuring the same dimensions as a 1590BB but with 125B clearance.

Call of Cthulhu Build Document

1590BB2 size (Drilled for dual wiring board mounted LEDs) – Drilled Enclosure Link

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 33 rows

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Variant
RefValueNormalizedTypeNotes
Resistors 11
R11M1M
R91M1M
R21M1M
R1010k10k
R31M1M
R261k1k
R410k10k
R54k74.7k
R6100R100
R71k1k
R81k51.5k
Capacitors 12
C5470n470n
C6330n330n
C7220n220n
C83n33.3n
C122n22n
C9220n220n
C21n1n
C10220n220n
C322pF22p
C11100uF100u
C4100pF100p
C12100n100n
Diodes 3
D11N9141N914
D21N9141N914
D51N58171N5817
Transistors 1
Q12N54582N5458
ICs 1
IC1OP07OP07
Potentiometers 3
LEVELA100KA100kPotentiometer
DISTA500KA500kPotentiometer
FILTERA100KA100kPotentiometer
LEDs 2
D3LEDLED
D4LEDLED