Overdrive Special - Dumbly Tube Pedal
The OVERDRIVE SPECIAL is a dual 12AX7 tube pedal preamplifier designed to mimic classic Dumble ODS tones. It is not a copy or clone, but rather a completely re-thought and re-designed circuit, intended to surpass the original. The COLOR control provides equalization identical to Dumble rock mode at noon, while duplicating Robben Ford settings when minimized. A LIFT switch pulls this control out of circuit, providing a 10dB boost in gain. The DRIVE control adjusts gain to compensate for various pickups (single-coil, humbucker). The ODS switch enables the high-gain section, which utilizes my all-tube symmetric clipper circuit, offering up what I believe to be superior performance. This is followed by another tilt TONE control and output LEVEL.
This pedal is ideally employed as a preamplifier feeding a power amplifier directly via effects loops return. It can also be used as a regular pedal.
Specifications
- True bypass
- 2 x 12AX7, all analog circuit
- 52dB maximum gain (no LIFT)
- 470k ohm input impedance
- 5mV input, onset of clipping (ODS, no LIFT)
- 3Vrms maximum output
- 105V tube supply
- 370mA current draw (supply included)
- 4.7" x 5.8" x 2.3"