1590B · 2 knobs
JMK PCBs· 011
Engineer's Thumb Compressor
Based on the Valve Wizard Engineer's Thumb· 2 other boards clone it
- Category
- Compressor
- Controls
- Level · Ratio
- Difficulty
- Easy
- Price
- $12.00in stock
- Tags
- limited-edition
From the vendor
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The Engineer’s Thumb is a unique compressor that picks up the classic OTA type of compressor and gives it some modern adjustment. Most notably, it’s has a much quieter noise floor, and it’s also less coloured than the classic Ross/Dyna type of compressor. This compressor is great to use with Acoustic, Electric and Bass guitars.
(Rev 1.0)
(Rev 1.2)
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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 32 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 15 | ||||
| R1 | 1K | 1k | ||
| R9 | 1M | 1M | ||
| R2 | 10M | 10M | ||
| R10 | 10K | 10k | ||
| R3 | 1M | 1M | ||
| R11 | 10K | 10k | ||
| R4 | 1M | 1M | ||
| R12 | 220R | 220 | ||
| R5 | 100R | 100 | ||
| R13 | 1K | 1k | ||
| R6 | 1K | 1k | ||
| R14 | 1M | 1M | ||
| R7 | 1K | 1k | ||
| R15 | 1M | 1M | ||
| R8 | 1K | 1k | ||
| Capacitors 6 | ||||
| C1 | 10nF | 10n | ||
| C5 | 1uF | 1u | ||
| C2 | 100pF | 100p | ||
| C6 | 1uF | 1u | ||
| C3 | 1uF | 1u | ||
| C7 | 100nF | 100n | ||
| Diodes 4 | ||||
| D1 | 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 | ||||
| LEVEL | A10K | A10k | Potentiometer | |
| RATIO | A1M | A1M | Potentiometer | |
| LEDs 2 | ||||
| D2 | Red LED | RED LED | ||
| D3 | Red LED | RED LED | ||
Other boards based on the Valve Wizard Engineer's Thumb
- Engineers Thumb Five Cats Pedals · 1590B · £4.50
- Mini Comp JMK PCBs