Fender Vibrolux AB763 - Vibrato preset

Verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The AB763 Vibrolux is the early blackface Vibrolux without reverb, which was replaced by the Vibrolux Reverb. It has Normal and Vibrato channels, each with volume, treble, bass and a bright switch. A 12AT7 long-tail inverter drives a pair of 6L6GCs from a GZ34 rectifier. Its bias-modulated tremolo has speed and intensity controls, and the circuit is almost identical to the Tremolux AB763 in a combo cabinet.

Tags: american, vintage, blackface, vibrato, 6l6, clean, two-channel.

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.