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.
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/07/cropped-CD07B98D-8760-4337-8A43-D16C2112A51D-scaled-1-540x720.jpeg?resize=540%2C720)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/07/F3955189-02BF-49B4-9C4D-01A15462E127-540x720.jpeg?resize=540%2C720)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/07/83E693B5-BA7C-45D9-B634-DA0EC502ACBE-540x720.jpeg?resize=540%2C720)
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.
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/12/F1976246-363B-4EB4-AB12-9A1CF2F3DB1D-540x720.jpeg?resize=540%2C720)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/12/41C8F95A-0629-4015-8570-74E6016DAA50-540x720.jpeg?resize=540%2C720)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/12/06081DB7-AD0A-4BBE-823D-992C39A1822F-540x720.jpeg?resize=540%2C720)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/12/2500BF11-6C5E-4896-850B-C1A173207A38-540x720.jpeg?resize=540%2C720)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/12/A0DCE05E-8DF7-4B9D-B5FC-22B0C15AB45B-540x720.jpeg?resize=540%2C720)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/12/B12DFB21-2D00-4D31-8466-718752796A29-540x720.jpeg?resize=540%2C720)
Order PCB here: 22/7 PCBs on OSHPARK
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/01/bddb5aff824030e42b21fd3a1f59dc70.png?resize=540%2C516)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/01/e0e7e355f1bdb11d06c18e9dbb70bbc6.png?resize=540%2C516)
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
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/07/Twentytwo-Sevenths-Wiring.png?resize=693%2C1302)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/01/Twentytwo-Sevenths-Drill-2.png?resize=1320%2C1920)
If you don’t want to build your own this one is for sale on Reverb.
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/01/1CB1B316-7A4B-4600-BA3A-32E395DC597C-540x720.jpeg?resize=540%2C720)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/01/FCC5E0C7-59D9-4C0A-9F0B-595DCB470EB6-540x720.jpeg?resize=540%2C720)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/01/6D14867A-1076-4177-8531-A1462192E018-540x720.jpeg?resize=540%2C720)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/01/B1B0474A-8160-4CF3-B270-3732A28D558E-540x720.jpeg?resize=540%2C720)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/01/111F7458-B8F0-448A-9291-BAD2073B1537-540x720.jpeg?resize=540%2C720)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2021/01/0B4DFB4D-DA37-492A-BB26-41C40287600A-540x720.jpeg?resize=540%2C720)