Enclosure not stated
From the vendor
The ZW-44 is quite an interesting overdrive for everyone bored with the classic Tube Screamer. The circuit is based on the MC33178 op-amp rarely found in guitar equipment. Thanks to the slightly trimmed bottom, it performs very well when plugged in before tube distortion. It does not muffle, it allows you to nicely extend the sustain and build a dense, saturated drive.
PCB. Dimensions: 43mm x 34mm.
Files to download:
•
ZW-44 ENG.pdf
Schematic
The schematic is in the vendor's build document, page 1. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 35 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 16 | ||||
| R12 | 470R | 470 | ||
| R7 | 4k7 | 4.7k | ||
| R14 | 4k7 | 4.7k | ||
| R1 | 10k | 10k | ||
| R9 | 10k | 10k | ||
| R13 | 10k | 10k | ||
| R15 | 10k | 10k | ||
| R5 | 22k | 22k | ||
| R2 | 100k | 100k | ||
| R6 | 100k | 100k | ||
| R0 | 1M | 1M | ||
| R3 | 1M8 | 1.8M | ||
| R4 | 2M2 | 2.2M | ||
| R8 | 33k | 33k | C9 10u | |
| R10 | 33k | 33k | C11 10n | |
| R11 | 33k | 33k | C12 3u3 | |
| Capacitors 10 | ||||
| C7 | 120p | 120p | ||
| C4 | 3n3 | 3.3n | ||
| C11 | 10n | 10n | ||
| C5 | 15n | 15n | ||
| C3 | 47n | 47n | ||
| C6 | 47n | 47n | ||
| C12 | 3u3 | 3.3u | ||
| C2 | 4u7 | 4.7u | ||
| C9 | 10u | 10u | ||
| C1 | 100u | 100u | ||
| Diodes 4 | ||||
| D1 | 1N400X | 1N400X | ||
| D2 | 1N914 | 1N914 | ||
| D3 | 1N914 | 1N914 | ||
| D4 | 1N914 | 1N914 | ||
| Transistors 1 | ||||
| Q1 | MPSA14 | MPSA14 | ||
| ICs 1 | ||||
| U1 | MC33178 | MC33178 | ||
| Potentiometers 3 | ||||
| RV1 | A1M D4 1N914 | A1M D4 1N914 | ||
| RV2 | B20k Q1 MPSA14 | B20K Q1 MPSA14 | ||
| RV3 | B10k U1 MC33178 | B10K U1 MC33178 | ||