Silvertone 1333 - Instrument preset

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

The Silvertone 1333 (chassis 185.806) is a Sears tube combo with a microphone input and two instrument inputs, each side getting half of a 6SC7 dual triode and its own volume, followed by a single tone control. A 6SN7GT provides gain and a split-load phase inverter for two cathode-biased 6V6GTs push-pull. A 6SJ7 tremolo oscillator has Speed and Strength controls and a push switch; a 6X5GT rectifies.

• Made in: USA
• Wattage: 10W
• Channels: 2
• Preamp tubes: 1× 6SC7, 1× 6SN7GT, 1× 6SJ7
• Power tubes: 2× 6V6GT

Tags: american, vintage, tremolo, two-channel.

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.