BUTLER TUBE DRIVER - The core circuit design on the 2000s reissue 911 Tube Driver is similar to the original 1985-87 versions, but there were several component value changes across the circuit that affect the way it sounds, as well as different pots. Therefore, the tubes are positioned to naturally and actively respond to the dynamic speaker load. BUTLER/CHANDLER TUBE DRIVER VS 2000s ERA B.K. The only other chiclett style cap on the component side is a 103K, 100v and is labeled as such.Īudio taper pots - Drive 500k, LO 100k, HI 500k, Output 100k.ĥ ea, 473k, 100v, Yellow chiclett style, one on the trace side, 4 on the component sideġ ea, 103k, 100v, Yellow chiclett style on component sideīK Tubedriver 005.jpg (44.5 KiB) Viewed 6126 times BK Tubedriver 018.jpg (59.01 KiB) Viewed 6126 times BK Tubedriver 017.jpg (59.61 KiB) Viewed 6126 times BK Tubedriver 016.jpg (54.96 KiB) Viewed 6126 times BK Tubedriver 002.1.JPG (57. BK Butlers Tube Driver BLUE technology places the triodes exactly where they should be: DC coupled through the output power devices to the speakers. Used a low gain 6AV6 or 12AV6 tube for distortion and transistor stage for compression. Very high gain with built in compression. I listed only one 473uF, 100v on the component side, all others on this side not labeled are these type. The earliest Tube Driver, hand made by BK Butler in Escondido, California, circa 1979-1980. 4 of these are on the component side and 1 on the trace side (Hence the label indicating 5 ea). The layout included is for an off-board tube socket (not mounted on the PCB). There is almost no possible patenting on guitar effects circuits because they are so simple.There are some American patents about guitar pedals (ex: BK Butler Tube Driver), but they have a limited time validity. There's only 1 cap on the trace side, it's a 473uF, 100v. Build it at your own risk This is the Tube Driver clone. Someone wanted detailed cap and pot values of my Tubedriver, so here goes: