bk butler tube works tube driver pedal 9 volt schematic

Most players find a 'sweet spot' about 2:30 - 3 o'clock on the control.Īll in all, it is a 'pro tool' type of control that each player can set to their own subjective taste.' It does not change the EQ directly but because the way the tube responds can be varied you will hear EQ differences at various settings.

Technically it varies the electrical 'strength' of the tube and that affects gain, texture and dynamics. The Bias control also adds dynamics and allows you to custom match your Tube Driver for any particular pickup/amp combination. Just go up or down a few clicks and he nails what he wants. Eric Johnson used to spend a lot of time looking for perfect tubes to use in his standard Tube Drivers, but now he can just set the bias easily with the stock tube. 'The Bias control is very helpful as it adjusts the amount of current applied to the cathode of the tube. So, what am I planning to do:ġ - Make this thing True Bypass the bypass switching currently employed by Overlord is terrible, a switch to true bypass will greatly improve the bypassed tone.Ģ - Incorporate the 'Bias' mod, here's a description of what the bias mod actually does from the B K Butler website: Now what I want to do is combine the best parts of each of these variations into one and modify my Overlord into the ultimate tube overdrive pedal. I took a look at various schematics with a view to modifying the Overlord to full-fill it's true potential:Īnd the newly updated Tube Driver itself (with the 'Bias' mod):Īnd another version by Bajaman - The Real Tube Overdrive with a regulated power supply and simplified tone control: Now there are plenty of variations on this design from B K Butler himself, Chandler and Tube Works among others.

Bk butler tube works tube driver pedal 9 volt schematic