What tubes does the Valco National 1205 - MIC use?

The Valco National 1205 - MIC uses 1× 12AX7 preamp tubes and 1× 6V6 power tubes.

When was the Valco National 1205 - MIC produced?

The Valco National 1205 - MIC was produced 1940s.

Valco National 1205 - MIC preset

Verified · 82/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The National 1205 is a 1940s Valco-manufactured amplifier from the company's early National brand era, predating the Supro line that would define Valco's later reputation. Built for the lap steel and electric guitar market of the immediate postwar period, it captures the first generation of Valco's circuit design philosophy. The dual-input MIC channel configuration reflects the era's approach to multi-instrument amplification.

Years produced: 1940s
Made in: USA
Wattage: 5W
Channels: 2
Preamp tubes: 1× 12AX7
Power tubes: 1× 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.