125B · 3 knobs
PedalPCB· PCB177
Integral Preamp
Based on the TC Integrated Preamp
- Category
- Boost
- Controls
- Volume · Bass · Treble
- Price
- $8.00in stock
- Tags
- 125B, 125B 3-Knob (Type 1)
From the vendor
Controls
• Volume
• Bass
• Treble
Specifications
• Designed for a 125B enclosure with top-mounted jacks
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 46 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 14 | ||||
| R1 | 4K7 | 4.7k | ||
| R2 | 22K | 22k | ||
| R3 | 1M | 1M | ||
| R4 | 6M8 | 6.8M | ||
| R5 | 100K | 100k | ||
| R6 | 220K | 220k | ||
| R7 | 470R | 470 | ||
| R8 | 4K7 | 4.7k | ||
| R9 | 8K2 | 8.2k | ||
| R10 | 220R | 220 | ||
| R100 | 4K7 | 4.7k | ||
| R101 | 10K | 10k | ||
| R102 | 100K | 100k | ||
| R103 | 1M | 1M | ||
| Capacitors 16 | ||||
| C1 | 47n | 47n | ||
| C2 | 100p | 100p | ||
| C3 | 4u7 | 4.7u | ||
| C4 | 4n7 | 4.7n | ||
| C5 | 47n | 47n | ||
| C6 | 1u | 1u | ||
| C7 | 22n | 22n | ||
| C8 | 220n | 220n | ||
| C9 | 4u7 | 4.7u | ||
| C100 | 100u | 100u | ||
| C102 | 10u | 10u | ||
| C103 | 10u | 10u | ||
| C104 | 10u | 10u | ||
| C105 | 10u | 10u | ||
| C106 | 10u | 10u | ||
| C107 | 10u | 10u | ||
| Diodes 9 | ||||
| D1 | 1S1588 | 1S1588 | ||
| D2 | 1S1588 | 1S1588 | ||
| D100 | 1N5817 | 1N5817 | ||
| D101 | 1N4001 | 1N4001 | ||
| D102 | 1N4001 | 1N4001 | ||
| D103 | 1N4001 | 1N4001 | ||
| D104 | 1N4001 | 1N4001 | ||
| D105 | 1N4001 | 1N4001 | ||
| D106 | 1N4001 | 1N4001 | ||
| Transistors 2 | ||||
| Q1 | BC548C | BC548C | ||
| Q2 | BC548C | BC548C | ||
| ICs 2 | ||||
| IC1 | TL071 | TL071 | ||
| IC100 | TC1044SCPA | TC1044SCPA | ||
| Potentiometers 3 | ||||
| TREBLE | C50K | C50k | Potentiometer | |
| BASS | C50K | C50k | Potentiometer | |
| LEVEL | A50K | A50k | Potentiometer | |