Airline 62-9021A preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Airline 62-9021A is a Valco-built student amp, the Montgomery Ward version of the Supro S6611. It is a transformerless AC/DC design: one 12AX7 stage drives a single-ended 50L6 into an 8-inch speaker, with just a volume control.

• Made in: USA
• Wattage: 5W
• Channels: 1
• Preamp tubes: 1× 12AX7
• Power tubes: 1× 50L6

Tags: american, vintage, class-a, low-wattage, practice.

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.