Enclosure not stated · 2 knobs
JMK PCBs· 039
Mini Comp
Based on the Valve Wizard Engineer's Thumb· 2 other boards clone it
- Category
- Compressor
- Controls
- Ratio · Level
- Difficulty
- Easy
- Price
- see vendor
- Tags
- limited-edition
From the vendor
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This limited edition Christmas Red PCB is a smaller, more condensed version of the Engineer’s Compressor. It utilizes a CA3080 chip in a fairly different configuration to give a much lower noise floor compressor. It also features a smaller footprint and only one knob (Compression Ratio) by using 1/8 watt resistor profiles and an onboard Volume trimpot, which enables the user to fit this in a smaller box, or as a companion compressor in a multi-build.
During the Christmas season of 2014, this PCB was offered to every order made. Unfortunately, we ran out of copies so this PCB won’t be made available for purchase.
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Schematic
The schematic is in the vendor's build document. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 34 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 16 | ||||
| R1 | 1M | 1M | ||
| R9 | 1K | 1k | ||
| R2 | 4.7K | 4.7k | ||
| R10 | 10K | 10k | ||
| R3 | 1K | 1k | ||
| R11 | 1K | 1k | ||
| R4 | 10M | 10M | ||
| R12 | 1M | 1M | ||
| R5 | 1K | 1k | ||
| R13 | 1M | 1M | ||
| R6 | 100R | 100 | ||
| R14 | 220R | 220 | ||
| R7 | 1M | 1M | ||
| R15 | 1M | 1M | ||
| R8 | 1K | 1k | ||
| R16 | 10K | 10k | ||
| Capacitors 7 | ||||
| C1 | 10n | 10n | ||
| C2 | 100p | 100p | ||
| C3 | 1u | 1u | ||
| C4 | 100u | 100u | ||
| C5 | 1u | 1u | ||
| C6 | 1u | 1u | ||
| C7 | 100n | 100n | ||
| Diodes 4 | ||||
| D3 | 1n4148 | 1N4148 | ||
| D4 | 1n4148 | 1N4148 | ||
| D5 | 1n4148 | 1N4148 | ||
| D6 | 1n4001 | 1N4001 | ||
| Transistors 1 | ||||
| Q1 | 2N3906 | 2N3906 | ||
| ICs 2 | ||||
| IC1 | TL074 | TL074 | ||
| IC2 | CA3080 | CA3080 | ||
| Potentiometers 2 | ||||
| RATIO | A1M | A1M | Potentiometer | |
| LEVEL | 10K | 10k | Potentiometer | |
| LEDs 2 | ||||
| D1 | LED | LED | ||
| D2 | LED | LED | ||
Other boards based on the Valve Wizard Engineer's Thumb
- Engineers Thumb Five Cats Pedals · 1590B · £4.50
- Engineer's Thumb Compressor JMK PCBs · 1590B · $12.00