What tubes does the Valco 1948 Supro - Normal use?

The Valco 1948 Supro - Normal uses 1× 12AX7 preamp tubes and 1× 6V6 power tubes.

When was the Valco 1948 Supro - Normal produced?

The Valco 1948 Supro - Normal was produced 1948.

Valco 1948 Supro - Normal preset

Verified · 83/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 1948 Supro is among the earliest documented examples from Valco's Supro brand, produced in the immediate postwar period when electric guitar amplification was still establishing its fundamental design vocabulary. The simple single-ended 6V6 circuit produces the warm, compressed tone with natural harmonic richness that made these early Valco designs musically compelling. This schematic documents a formative moment in American amp manufacturing history.

Years produced: 1948
Made in: USA
Wattage: 4W
Channels: 1
Preamp tubes: 1× 12AX7
Power tubes: 1× 6V6

Tags: american, vintage.

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.