125B · 7 knobs
From the vendor
Controls
• Level
• Boost
• Drive
• Bass
• Mid
• Treble
• Channel (Toggle switch)
Details
• Designed for a 125B enclosure with top-mounted jacks
Schematic
The schematic is in the vendor's build document, page 5. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 58 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 26 | ||||
| R2 | 10 | 10 | ||
| R3 | 4k7 | 4.7k | ||
| R4 | 4k7 | 4.7k | ||
| R5 | 1M | 1M | ||
| R6 | 1k | 1k | ||
| R23 | 1k | 1k | ||
| R27 | 1k | 1k | ||
| R7 | 560k | 560k | ||
| R8 | 10k | 10k | ||
| R21 | 10k | 10k | ||
| R9 | 470k | 470k | ||
| R10 | 47k | 47k | ||
| R11 | 47k | 47k | ||
| R12 | 47k | 47k | ||
| R18 | 47k | 47k | ||
| R13 | 6k8 | 6.8k | ||
| R14 | 3k3 | 3.3k | ||
| R19 | 3k3 | 3.3k | ||
| R15 | 68k | 68k | ||
| R16 | 2k7 | 2.7k | ||
| R17 | 27k | 27k | ||
| R20 | 27k | 27k | ||
| R22 | 270k | 270k | ||
| R24 | 1k5 | 1.5k | ||
| R25 | 220k | 220k | ||
| R26 | 39k | 39k | ||
| Capacitors 16 | ||||
| C1 | 100u | 100u | ||
| C2 | 47u | 47u | ||
| C3 | 10n | 10n | ||
| C4 | 3n9 | 3.9n | ||
| C5 | 3n9 | 3.9n | ||
| C6 | 15n | 15n | ||
| C7 | 750p | 750p | ||
| C8 | 68n | 68n | ||
| C9 | 1u | 1u | ||
| C12 | 1u | 1u | ||
| C16 | 1u | 1u | ||
| C10 | 1n | 1n | ||
| C11 | 100n | 100n | ||
| C13 | 4n7 | 4.7n | ||
| C14 | 470p | 470p | ||
| C15 | 5n6 | 5.6n | ||
| Diodes 3 | ||||
| D1 | 1N5817 | 1N5817 | ||
| D3 | Ge | GE | Any Ge diodes will work. | |
| D4 | Ge | GE | Any Ge diodes will work. | |
| Transistors 3 | ||||
| Q1 | 2N5087 | 2N5087 | ||
| Q2 | 2N7000 | 2N7000 | 2N7002 for SMD | |
| Q3 | 2N7000 | 2N7000 | 2N7002 for SMD | |
| ICs 2 | ||||
| IC1 | TL072 | TL072 | ||
| IC2 | TL072 | TL072 | ||
| Potentiometers 6 | ||||
| POT1 | A10k | A10k | ||
| POT2 | C50k | C50k | ||
| POT4 | C50k | C50k | ||
| POT5 | C50k | C50k | ||
| POT3 | C25k | C25k | ||
| POT6 | C100k | C100k | ||
| Switches 1 | ||||
| SW1 | On/On | ON/ON | ||
| LEDs 1 | ||||
| D2 | LED | LED | ||