Valco Model 22 preset

verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Valco Model 22 is a small 1960s combo with reverb and tremolo, of the kind Valco of Chicago built for its National and Supro lines and other brands. Two Regular inputs and a Treble input feed a 12AX7 stage and one volume control. A 12AX7 drives a spring reverb with a recovery stage, level control and footswitch, and another runs a footswitchable tremolo. A tone control precedes a single cathode-biased 6V6 in single-ended class A, on a 5Y3.

• Made in: USA
• Channels: 1
• Preamp tubes: 4× 12AX7
• Power tubes: 1× 6V6

Tags: american, vintage.

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.