Underground Accelerator – Handwired Special Edition

The Underground Accelerator has always been my answer to the question “what preamp should I use if I don’t know what preamp I should use?” I’ve been making this circuit for a long time, and I’ve learned a lot along the way, so I wanted to do a special edition of “the best version of this pedal I could possibly make. What makes this one different: Hybrid circuit board with concealed modern power circuitry on the bottom and plated brass turrets on top Mallory film caps and Vishay film resistors for the audio path Robust ceramic tube socket Internal regulated 6.3V tube heater power supply and 340V tube plate power supply Soft-switched relay bypass “Smart standby” – when power is first applied, the high-voltage supply is kept off and the pedal muted until the heater supply is stable and the tube is warmed up enough to operate (~15 seconds) Laser-cut wood faceplate inset into the chassis Individually serialized, limited run As a tube pedal, the Special Edition Handwired Underground Accelerator requires a high amount of current to operate correctly. Each pedal will ship with a 9V 1000mA power supply. Third-party supplies can be used as long as they are center-negative, 9VDC ≥600mA or 12VDC ≥500mA. Enclosure size: 4.8 in x 2.64 in x 1.58 in (122 mm x 67 mm x 39.6 mm)