What tubes does the Supro 1947 - Main use?

The Supro 1947 - Main uses 1x 12AX7 preamp tubes and 1x 6V6 power tubes.

When was the Supro 1947 - Main produced?

The Supro 1947 - Main was produced 1947–1951.

Supro 1947 - Main preset

Close · 72/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Supro 1947 is a small combo amplifier from Valco's early postwar lineup, featuring a single-ended output stage and a characteristically warm, slightly gritty tone that belies its modest wattage. Like its period counterparts, it uses 6V6 output tubes and a straightforward preamp with minimal tone shaping. These early Supros are prized for slide guitar and delta blues tonality.

Years produced: 1947–1951
Made in: USA
Wattage: 5W
Channels: 1
Preamp tubes: 1x 12AX7
Power tubes: 1x 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.