This project was originally posted over at FreeStompboxes,org. This is a great sounding Tone Bender. Easy to build, and parts are not hard to find. I haven’t tried it but it would probably work with a range of other transistors.
PCBs
I designed tis PCB and made it available through PCBWay.com on their shared service. You can order boards for yourself from their shared service here:
https://www.pcbway.com/project/shareproject/Tone_Bender_Si_f1f421a8.html
Schematic
Here is my drawing of the schematic for reference.
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/Stone-Bender-schem.png?resize=1530%2C850)
Parts List
Part Number | Value |
R1 | 1M |
R2 | 150K |
R3 | 22K |
R4 | 10K |
R5 | 1K |
R6 | 10K |
R7 | 100r |
R8 | 10K |
R9 | 10K |
R10 | 2K2 |
R11 | 10K |
R12 | 10K |
R13 | 47K |
R14 | 47K |
C1 | 10n |
C2 | 100n |
C3 | 100n |
C4 | 100n |
C5 | 8n2 |
C6 | 10µ |
C7 | 47µ |
C8 | 4µ7 |
D1 | 1n5817 |
D2 | LED |
Q1 | BC109 |
Q2 | BC109 |
Q3 | BC109 |
Q4 | BC109 |
GAIN | B1K |
TONE | B50K |
VOLUME | A100K |
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/Stone-Bender-Wiring.png?resize=342%2C642)
Drilling Guide
Download the drilling guide here.
Print the guide at 100% and wrap it around your enclosure with a piece of tape. This guide is meant to fit a 1590B sized enclosure.
Pictures
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/2AB39E0B-F136-40DE-8D6E-66ECBC362AA2-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/8B161C56-5EE1-41CB-B105-AAFDFC919BEE-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/59A8CD91-131D-4DC5-88EE-5887D91648EA-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/FA979492-8D18-4BAE-82D1-823F0E241DC3-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/389FC762-1440-45A8-9EC1-ECBB67F99CB3-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/B746BEE4-5AC4-460E-AFD2-7F1E0E7262AA-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/D0D1F11F-E4F6-4793-875F-2F94E3770C37-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/76B568F3-50BD-4B02-ACDA-702BF28CA387-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/8C41ACEB-6771-4CB4-BCAB-5AEDB6374C2D-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/51985447-6450-40D7-BF9F-84398CC941CD-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/78B7B68F-7CE8-418F-B0E0-B238DB9D34CC-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/D5938A1B-5518-40C6-B9F9-745EBF1C5994-scaled.jpeg?resize=1440%2C1920)