What tubes does the Supro Steel Guitar Amp 1946 - Normal use?

The Supro Steel Guitar Amp 1946 - Normal uses 1× 12AX7 preamp tubes and 1× 6V6 power tubes.

When was the Supro Steel Guitar Amp 1946 - Normal produced?

The Supro Steel Guitar Amp 1946 - Normal was produced 1946.

Supro Steel Guitar Amp 1946 - Normal preset

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

The 1946 Supro Steel Guitar Amp is one of the earliest known Valco designs, built specifically for lap steel guitar with a bright, cutting tone optimized for the instrument's unique playing technique. Like other Valco products of the immediate postwar period, it uses simple, proven circuits with modest power output. This schematic represents a foundational document in the history of American amplifier manufacturing.

Years produced: 1946
Made in: USA
Wattage: 3W
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.