What tubes does the Supro Steel Guitar Amp (1946) use?

The Supro Steel Guitar Amp (1946) uses 1× 6SQ7 preamp tubes and 1× 6V6GT power tubes.

When was the Supro Steel Guitar Amp (1946) produced?

The Supro Steel Guitar Amp (1946) was produced 1946.

Supro Steel Guitar Amp (1946) preset

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

A 1946 Supro steel guitar amp, about as simple as a valve amp gets. Two inputs feed the triode section of a 6SQ7, followed by a 500K volume control and nothing else: no tone control and no negative feedback. A single 6V6GT runs single-ended and cathode-biased in class A into a 1×8 speaker, with a 5Y3GT rectifier and a two-capacitor RC filter. A clean, compressed lap-steel voice that breaks up early when pushed.

Years produced: 1946
Made in: USA
Wattage: 5W
Channels: 1
Preamp tubes: 1× 6SQ7
Power tubes: 1× 6V6GT

Tags: american, vintage, 6v6, class-a, low-wattage.

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.