What tubes does the Airline Wards GDR-8516A - Channel A use?

The Airline Wards GDR-8516A - Channel A uses 12AX7 preamp tubes and 6V6 power tubes.

When was the Airline Wards GDR-8516A - Channel A produced?

The Airline Wards GDR-8516A - Channel A was produced 1962–1968.

Airline Wards GDR-8516A - Channel A preset

Verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Wards GDR-8516A is a mid-1960s reverb-equipped tube combo from the Wards/Airline brand, manufactured by Valco and typical of the GDR series' warm, raw American budget amp character. The 8516A sits within the mid-range of the GDR catalog and offers two channels alongside the built-in spring reverb that distinguishes GDR models. Valco's efficient production methods allowed these amps to provide genuine tube warmth at prices accessible to everyday American musicians.

Years produced: 1962–1968
Made in: USA
Channels: 2
Preamp tubes: 12AX7
Power tubes: 6V6

Tags: american, vintage.

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.