Built and test this second version of the 22/7 by RunOffGroove.com. Sounds good. This is a great alternative for Big Muff fans. The OSHPark project is public and verified.
22/7 is a Big Muff built around CMOS inverters in place of the transistors used in the traditional BMP circuit. The CMOS inverters have a tube like sound when over driven.
You can order boards for this project at PCBWay.com. I have two versions of the board. One uses the 4049 and the other uses the 4069. Otherwise the rest of the parts are the same.
Order PCB here: 22/7 PCBs on OSHPARK
Parts List
| Capacitors | |
| C1 | 100µ |
| C2 | 33n |
| C3 | 100n |
| C4 | 220p |
| C5 | 150p |
| C6 | 150p |
| C7 | 100n |
| C8 | 100n |
| C9 | 3n3 |
| C10 | 6n8 |
| C11 | 10n |
| C12 | 10n |
| C13 | 100n |
| C14 | 150p |
| C15 | 100n |
| Diodes | |
| D1-4 | 1N914 |
| D5 | 1N5817 |
| D6 | LED |
| IC | |
| IC1 | CD4049UBE |
| Resistors | |
| R1 | 100K |
| R2 | 470 |
| R3 | 1M |
| R4 | 1K |
| R5 | 33K |
| R6 | 1M |
| R7 | 33K |
| R8 | 1M |
| R9 | 39K |
| R10 | 27K |
| R11 | 1M |
| R12 | 1M |
| R13 | 330K |
| R14 | 100K |
| R15 | RLED |
| Switch | |
| RANGE | ON OFF ON |
| Pots | |
| SUSTAIN | A100K 16MM |
| TONE | B100K 16MM |
| VOLUME | A100K 16MM |
Wiring
If you don’t want to build your own this one is for sale on Reverb.
Leave a Reply