What tubes does the Supro 1690T (also 1615T, 1695T) - Norm Ch 1 use?

The Supro 1690T (also 1615T, 1695T) - Norm Ch 1 uses 2× 12AX7 preamp tubes and 2× 6L6 power tubes.

When was the Supro 1690T (also 1615T, 1695T) - Norm Ch 1 produced?

The Supro 1690T (also 1615T, 1695T) - Norm Ch 1 was produced 1963–1968.

Supro 1690T (also 1615T, 1695T) - Norm Ch 1 preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Supro 1690T is one of the most powerful amplifiers in the Valco Supro lineup, pushing 35 watts through two 6L6 output tubes for a bold, bright American tone with significant clean headroom. The circuit is shared across multiple Valco brands including the Gretsch G6152 and Airline variants, demonstrating the reach of Valco's OEM manufacturing. Its combination of power and tonal character makes it a versatile amp for a wide range of American styles.

Years produced: 1963–1968
Made in: USA
Wattage: 35W
Channels: 2
Preamp tubes: 2× 12AX7
Power tubes: 2× 6L6

Tags: american, vintage, clean.

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.