What tubes does the Airline GDR-8513A - Microphone use?

The Airline GDR-8513A - Microphone uses 12AX7, 12AU7 preamp tubes and 6V6, 6V6 power tubes.

When was the Airline GDR-8513A - Microphone produced?

The Airline GDR-8513A - Microphone was produced 1963–1967.

Airline GDR-8513A - Microphone preset

Verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Airline GDR-8513A is a Valco-built combo offering a step up in power within the budget-oriented Airline lineup. Featuring a dual 6V6 push-pull output stage and Valco's signature tremolo circuit, this amp delivers approximately 15 watts with a fat, scooped midrange tone typical of American designs of the period. The transformers are modest but give the amp a soft, forgiving compression that complements blues and early rock playing. Like all Valco Airline models, it is housed in a utilitarian cabinet that prioritizes function over cosmetics.

Years produced: 1963–1967
Made in: USA
Wattage: 15W
Channels: 2
Preamp tubes: 12AX7, 12AU7
Power tubes: 6V6, 6V6

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.