What tubes does the Airline GDR-9015A - Channel A use?

The Airline GDR-9015A - Channel A uses 12AX7, 12AX7 preamp tubes and 6L6, 6L6 power tubes.

When was the Airline GDR-9015A - Channel A produced?

The Airline GDR-9015A - Channel A was produced 1966–1968.

Airline GDR-9015A - Channel A preset

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

The Airline GDR-9015A is a late Valco-era model featuring a more refined control layout with separate bass and treble EQ, representing Valco's response to increasingly competitive market pressures. Its push-pull 6L6 power stage delivers a clean, open tone well suited to the rhythm playing demands of the late 1960s. The amp includes a built-in tremolo with rate and depth controls and was sold through Montgomery Ward as an affordable alternative to Fender and Gibson combos. Examples in good condition are now sought for their stable circuit and easy-to-service layout.

Years produced: 1966–1968
Made in: USA
Wattage: 30W
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.