Montgomery Ward 94-JDR-8420 - Channel 1 preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 94-JDR-8420 is a Valco-built amplifier sold under the Montgomery Ward catalog brand. Two 12SJ7 pentode preamp stages drive a pair of 6L6GTs in push-pull from a 5Y3 rectifier, into a field-coil speaker, a design typical of Valco's early octal-tube amps.

• Made in: USA
• Wattage: 15W
• Channels: 2
• Preamp tubes: 2× 12SJ7
• Power tubes: 2× 6L6GT

Tags: american, vintage, 6l6, low-wattage, 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.