This is a self-verified layout of the famous Baja version of the BK Butler/Chandler Tube Drive. The original project runs on an 16v AC adapter so chances are that the original will sound better than my 12v DC version...
Why use 12v DC instead of 16v AC?
Well, simply because my power supply only supplies DC and I don't like to add another to my pedalboard ;) The LTC1054/ICL7660S inverts the 12v DC to minus 11-ish Volts DC. The original project uses a maximum of 14v DC and minus 15v DC.
The project is designed around the 12AX7 tube, but you can use every pin compatible tube to change the drive's characteristics and/or gain.
I used the same voltage inverter as this project. It's based on a reference design found in the datasheet of the LTC1054. Note: when using the ICL7660S you might need to omit the tracecut between pin 1 and 8 of IC2 to boost the frequency of the internal oscillator.
Click here to see the bill-of-materials as a list or download it as a comma separated values file (.csv).
BB Forum code