What tubes does the Supro Valco Early 1953 - Main use?

The Supro Valco Early 1953 - Main uses 2x 12AX7 preamp tubes and 2x 6V6 power tubes.

When was the Supro Valco Early 1953 - Main produced?

The Supro Valco Early 1953 - Main was produced 1952–1954.

Supro Valco Early 1953 - Main preset

Close · 78/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Supro/Valco Early 1953 refers to Valco's transitional amplifier designs from the early 1950s, when the company was refining its circuit architectures between the postwar period and the rock and roll era. These units feature the characteristic Valco build quality — sturdy steel chassis, efficient circuits, and a raw, direct tone. Early 1953 Valco/Supros are historically important as precursors to the models that would later become associated with blues and rock legends.

Years produced: 1952–1954
Made in: USA
Wattage: 14W
Channels: 1
Preamp tubes: 2x 12AX7
Power tubes: 2x 6V6

Tags: american.

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.