It does not change the EQ directly but because the way the tube responds can be varied you will hear EQ. Technically it varies the electrical 'strength' of the tube and that affects gain, texture and dynamics. 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 6123 times BK Tubedriver 018.jpg (59.01 KiB) Viewed 6123 times BK Tubedriver 017.jpg (59.61 KiB) Viewed 6123 times BK Tubedriver 016.jpg (54.96 KiB) Viewed 6123 times BK Tubedriver 002.1.JPG (57. The Bias control also adds dynamics and allows you to custom match your Tube Driver for any particular pickup/amp combination. A consistency among the reviews seemed to be that this pedal is supposed to sound really nice when played thru a clean tube amp that has headroom. My chain is: Guitar > Sunface BC > BK Butler Tube Driver w/ Bias > Line on the 90s tube driver and whiches are cuted by the capacitors in the circuit. BK Butler tube driver review 6/4/17 I read lots of reviews about distortion pedals before I pulled the trigger on this one.

It looks like an older model, 3 knobs and 9v ac adaptor with 12ax7 tube, hand scribed serial on back. I listed only one 473uF, 100v on the component side, all others on this side not labeled are these type. BUTLER REAL TUBE OVERDRIVE - The Tube Driver is a booster/overdrive pedal with an IC and vacuum tube driven preamp circuit inside, used by. I got my hands on a BK Butler Tube driver. 4 of these are on the component side and 1 on the trace side (Hence the label indicating 5 ea). Bk Butler Tube Schematic Driver Tubes To Without the phase shift and induction generation caused by hundreds of turns of wire and massive core iron to overcome, BK Butlers newly patented current multiplying DC coupled circuitry allows the 6SL7GT output driver tubes to directly operate into the constant ratio-reduced speaker load. There's only 1 cap on the trace side, it's a 473uF, 100v. Someone wanted detailed cap and pot values of my Tubedriver, so here goes:

Bk butler tube driver schematic