125B · 3 knobs
Refractor Bypass
- Category
- Utility
- Controls
- Gain · Treble · Volume
- Price
- see vendor
Schematic
The schematic is in the vendor's build document, page 8. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 75 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 31 | ||||
| R1 | 10k | 10k | Metal film resistor, 1/4W | |
| R2 | 2M | 2M | Metal film resistor, 1/4W | |
| R3 | 100k | 100k | Metal film resistor, 1/4W | |
| R4 | 560R | 560 | Metal film resistor, 1/4W | |
| R5 | 5k1 | 5.1k | Metal film resistor, 1/4W | |
| R6 | 10k | 10k | Metal film resistor, 1/4W | |
| R7 | 1k5 | 1.5k | Metal film resistor, 1/4W | |
| R8 | 1k5 | 1.5k | Metal film resistor, 1/4W | |
| R9 | 1k | 1k | Metal film resistor, 1/4W | |
| R10 | 2k | 2k | Metal film resistor, 1/4W | |
| R11 | 15k | 15k | Metal film resistor, 1/4W | |
| R12 | 422k | 422k | Metal film resistor, 1/4W | |
| R13 | 1k | 1k | Metal film resistor, 1/4W | |
| R15 | 22k | 22k | Metal film resistor, 1/4W | |
| R16 | 47k | 47k | Metal film resistor, 1/4W | |
| R17 | 27k | 27k | Metal film resistor, 1/4W | |
| R18 | 12k | 12k | Metal film resistor, 1/4W | |
| R19 | 15k | 15k | Metal film resistor, 1/4W | |
| R20 | 392k | 392k | Metal film resistor, 1/4W | |
| R21 | 1k8 | 1.8k | Metal film resistor, 1/4W | |
| R22 | 100k | 100k | Metal film resistor, 1/4W | |
| R23 | 4k7 | 4.7k | Metal film resistor, 1/4W | |
| R24 | 100k | 100k | Metal film resistor, 1/4W | |
| R25 | 560R | 560 | Metal film resistor, 1/4W | |
| R26 | 68k | 68k | Metal film resistor, 1/4W | |
| R27 | 68k | 68k | Metal film resistor, 1/4W | |
| R28 | 100k | 100k | Metal film resistor, 1/4W | |
| R29 | 27k | 27k | Metal film resistor, 1/4W | |
| R30 | 27k | 27k | Metal film resistor, 1/4W | |
| RPD | 2M | 2M | Metal film resistor, 1/4W I | nput pulldown resistor for true bypass mode. |
| LEDR | 10k | 10k | Metal film resistor, 1/4W | LED current-limiting resistor. Adjust value to change LED brightness. |
| Capacitors 22 | ||||
| C1 | 100n | 100n | Film capacitor, 7.2 x 2.5mm | |
| C2 | 4.7uF | 4.7u | Electrolytic capacitor, 4mm | |
| C3 | 100n | 100n | Film capacitor, 7.2 x 2.5mm | |
| C4 | 68n | 68n | Film capacitor, 7.2 x 2.5mm | |
| C5 | 68n | 68n | Film capacitor, 7.2 x 2.5mm | |
| C6 | 390n | 390n | Film capacitor, 7.2 x 2.5mm | |
| C7 | 82n | 82n | Film capacitor, 7.2 x 2.5mm | |
| C8 | 390pF | 390p | MLCC capacitor, NP0/C0G | |
| C9 | 1uF | 1u | Film capacitor, 7.2 x 3.5mm | |
| C10 | 1uF | 1u | Film capacitor, 7.2 x 3.5mm | |
| C11 | 2n2 | 2.2n | Film capacitor, 7.2 x 2.5mm | |
| C12 | 27n | 27n | Film capacitor, 7.2 x 2.5mm | |
| C13 | 820pF | 820p | MLCC capacitor, NP0/C0G | |
| C14 | 3n9 | 3.9n | Film capacitor, 7.2 x 2.5mm | |
| C15 | 4.7uF | 4.7u | Electrolytic capacitor, 4mm | |
| C16 | 1uF | 1u | Tantalum capacitor, 044A | Note the polarity before soldering, which is marked differently than other types of caps. |
| C17 | 100uF | 100u | Electrolytic capacitor, 6.3mm | Power supply filter capacitor. |
| C18 | 47uF | 47u | Electrolytic capacitor, 5mm | Voltage reference filter capacitor. |
| C19 | 10uF | 10u | Electrolytic capacitor, 5mm | |
| C20 | 10uF | 10u | Electrolytic capacitor, 5mm | |
| C21 | 10uF | 10u | Electrolytic capacitor, 5mm | |
| C22 | 10uF | 10u | Electrolytic capacitor, 5mm | |
| Diodes 5 | ||||
| D1 | BAT41 | BAT41 | Diode, Schottky, DO-35 | Substitute for original germanium diodes. If you want to use real |
| D2 | BAT41 | BAT41 | Diode, Schottky, DO-35 | germaniums, the Russian D9 series is recommended (D9E, D9F, etc.) |
| D3 | 1N4001 | 1N4001 | Diode, rectifier, DO-41 | Can sub 1N4002, 1N4003, etc. |
| D4 | 1N4001 | 1N4001 | Diode, rectifier, DO-41 | |
| Z1 | 1N4742A | 1N4742A | Diode, zener, 12V, DO-41 | Overvoltage protection for the charge pump. |
| ICs 3 | ||||
| IC1 | TL072 | TL072 | Operational amplifier, DIP8 | |
| IC2 | TL072 | TL072 | Operational amplifier, DIP8 | |
| IC3 | LT1054CP | LT1054CP | Charge pump, DIP8 | Can also use TC1044SCPA. |
| Potentiometers 3 | ||||
| GAIN | 100kB dual | 100KB DUAL | Potentiometer, 16mm right-angle | Linear taper, dual right-angle PCB mount. |
| TREBLE | 10kB | B10k | Potentiometer, 16mm right-angle | Linear taper. |
| VOLUME | 10kB | B10k | Potentiometer, 16mm right-angle | Linear taper. |
| Switches 2 | ||||
| SLIDE | 4PDT slide | 4PDT SLIDE | Slide switch, 4PDT | E-Switch EG4208 (4mm lever) or EG4208A (6mm lever) |
| FSW | 3PDT | 3PDT | Stomp switch, 3PDT | |
| LEDs 1 | ||||
| LED | 5mm | 5MM | LED, 5mm | Adjust LEDR resistor to set brightness depending on the LED used. |
| Jacks & sockets 6 | ||||
| IC1-S | DIP-8 socket | DIP-8 SOCKET | IC socket, DIP-8 | |
| IC2-S | DIP-8 socket | DIP-8 SOCKET | IC socket, DIP-8 | |
| IC3-S | DIP-8 socket | DIP-8 SOCKET | IC socket, DIP-8 | |
| IN | 1/4" stereo | 1/4" STEREO | 1/4" phone jack, closed frame | Switchcraft 112BX or equivalent. |
| OUT | 1/4" mono | 1/4" MONO | 1/4" phone jack, closed frame | Switchcraft 111X or equivalent. |
| DC | 2.1mm | 2.1MM | DC jack, 2.1mm panel mount | Mouser 163-4302-E or equivalent. |
| Hardware 2 | ||||
| BATT | Battery snap | BATTERY SNAP | 9V battery snap | Optional. Use the soft plastic type—the hard-shell type will not fit. |
| ENC | 125B | 125B | Enclosure, die-cast aluminum | Can also use a Hammond 1590N1. |