Selmer Chieftain 200 - Channel 1 preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Selmer Chieftain 200 is a 200-watt valve head from Selmer London. One instrument channel has two ECC83 stages around a bass/treble stack with a send/return break; the other uses Selmer’s push-button Selectortone network for preset voicings. They meet at two ECC83 phase-splitter/driver sections, each feeding four EL34s through its own output transformer, with a silicon bridge rectifier and standby. Seven ECC83s and eight EL34s in all.

• Made in: UK
• Wattage: 200W
• Channels: 2
• Preamp tubes: 7× ECC83
• Power tubes: 8× EL34

Tags: british, vintage, el34, two-channel, high-wattage.

Schematic-derived preset files for 16 Fractal and Line 6 modelers: Axe-Fx II/XL/XL+, Axe-Fx III, FM3, FM9, and the full Helix family (Floor, LT, Rack, HX Stomp, HX Stomp XL, Native).

Gridleak extracts amp parameters from original circuit schematics using AI vision — component values, gain staging, tone stack topology, tube types — then generates native preset files for every supported modeler. Every extraction is scored 0–100 and the score is published.