Guild Thunder 1 T1-RVT preset

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

The Thunder One T1-RVT is a 1966 Guild combo with a single channel fed by Mic, Normal and Bright inputs, with treble, bass and volume controls and a normal/bright switch. A 6BM8 drives and recovers the spring reverb with a level control and switch, and half of a 12AX7 runs the tremolo with speed and strength. Two 6GW8s provide the driver and inverter triodes and a push-pull pair of EL84-type pentodes, on a 6CA4 rectifier, into an 8-ohm speaker.

• Made in: USA
• Wattage: 20W
• Channels: 1
• Preamp tubes: 3× 12AX7, 1× 6BM8
• Power tubes: 2× 6GW8

Tags: american, vintage, clean, reverb, tremolo.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.