Tremble

Bias tremolo circuit inspired by the built-in tremolo found in vintage Vox AC30 amplifiers. Pure sine-wave bias trem design without wave shape selection—focused on one thing done well.

Volume, Depth, and Speed controls with true bypass footswitch. Status LED behind the transparent speed knob provides visual rate feedback, making it easy to see the current tremolo speed on a dark stage.

Replicates the classic bias tremolo from vintage Vox AC30 and similar amps. Range goes from gentle warble to choppy staccato pulses for classic surf and vintage rock tones. Analog circuit, 9V DC only, no battery option.