EF86 Booster - Tube PedalThe EF86 BOOSTER is a boutique all analog vacuum tube pedal using a pentode to deliver warm, clean gain for overdriving amplifier inputs or other pedals. This unique design minimizes current consumption while still providing high voltage for proper tube operation. Tons of headroom! Dial in your desired amount of tubey warmth via the DRIVE control. The following scope photos show low (clean), medium, and high drive waveforms. Plenty of 2nd order
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