M03 · open-loop CF
Self-bias triode
Z_out cl
70 Ω
Ripple
150.0 mV
Line reg
11 %
P_diss
3.5 W
For
Tube-amp builders who want a real Studio: design any tube regulator from spec, simulate, diagnose and export.
You will learn
- Compare every tube-only regulator topology on a shared bench
- Master cold-cathode VR physics, stacking and ballast sizing
- Design series + error-amp regulators with predictable Zout, ripple and stability
- Diagnose live faults (oscillation, sag, hum, no-strike) with the interactive assistant
- Export Markdown reports + SPICE netlists wired to Ampera's Koren tube models
Before you start
Power supply & rectification
Time & level
45 minAdvanced
Next step
← All labs
Lab 07 / 07
Multi-design comparator
Three regulators side-by-side, same load step. Pedagogical KO.
Synchronised 50 → 200 mA step on all three designs. Watch where each ends up.
M05 · feedback loop
Series + error amp
Z_out cl
1.5 Ω
Ripple
1.0 mV
Line reg
0.1 %
P_diss
3.5 W
M06 · multi-tube
Feed-forward correction
Z_out cl
0.4 Ω
Ripple
15 µV
Line reg
0.01 %
P_diss
4.2 W
Same step, three responses. The self-bias triode droops visibly (no feedback to correct). The series + error amp recovers in ~1 ms. The feed-forward stays nearly flat — the spare triode injects the correction before the loop has had time to react.
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