What tubes does the Airline GDR-9012A - Normal use?

The Airline GDR-9012A - Normal uses 12AX7, 12AX7 preamp tubes and 6L6, 6L6 power tubes.

When was the Airline GDR-9012A - Normal produced?

The Airline GDR-9012A - Normal was produced 1966–1968.

Airline GDR-9012A - Normal preset

Close · 78/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Airline GDR-9012A is a late-1960s Valco design marking the transitional period when Valco began updating circuits to meet the demand for higher gain and more versatile tonal control. It retains a two-channel layout with independent volume controls and offers a brighter, more aggressive preamp voice than earlier Valco models. The 6L6 output section provides clean American headroom, and the amp's straightforward layout makes it a practical platform for modification. Construction quality remains utilitarian, true to the Airline brand's budget positioning.

Years produced: 1966–1968
Made in: USA
Wattage: 25W
Channels: 2
Preamp tubes: 12AX7, 12AX7
Power tubes: 6L6, 6L6

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.