Bench tool

Virtual Oscilloscope

Simulates the scope trace you’d see turning up volume and tone into a signal generator — the same tone-stack solver and clean-headroom math as the live site tools, plus a new asymmetric clipping model for the power stage.

Oscilloscope

Power stage

Auto-filled with typical published values for the selected tube — edit for your amp's actual B+ and transformer impedance.

Idle plate dissipation
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Tone stack

Stack

Signal generator

Frequency Presets

Scope

Frequency 1000 Hz
Time/Div 1.0 ms
Volts/Div 100 V

Output power

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Deviation from linear

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Clean headroom

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Tone stack: same complex nodal-analysis solver as the Tone Stack Calculator, trimmed to the Fender/Marshall/Vox family for this tool. Power stage ceiling: same swing/clean-fraction math as the Clean Headroom Calculator. Clipping model: a new asymmetric soft-clip approximation — gradual on the grid-conduction side, sharper on the plate-cutoff side — not a SPICE simulation. No transformer saturation or tube-to-tube variance is modeled.

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