Based on Chandler Tube Driver
About
The Chandler Tube Driver is an overdrive pedal produced between 1986 and 1991 that is most famously used by Eric Johnson, David Gilmour, Billy Gibbons and Joe Satriani.
It features controls for Out Level, EQ (sometimes split into High and Low EQ), and Tube Drive Level. It uses a single 12AX7 tube to boost the signal.