Mellow Yellow Tremolo

The Mellow Yellow Tremolo uses true sine wave modulation like early amplifier tremolo circuits. A sinusoidal oscillator modulates signal strength with bias set for symmetrical modulation, delivering everything from '50s-style soft swing to deep modern pulsing.

Three controls: Speed sets modulation rate, Depth goes from barely noticeable to nearly full on/off chopping, and Level primarily balances effect on/off volume but can also boost signal for stronger effect.

Current draw is 5.5mA. Input impedance 340K, output 1K ohm. Runs on 7.5-15V. True bypass switching. The sine wave approach produces smoother modulation than square wave tremolos.