Rob Robinette 5F1M Champ Micro EF80 preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 5F1M Champ Micro is a Rob Robinette DIY amp based on the tweed 5F1 Champ, with a 12AY7 preamp/driver feeding a single-ended EF80 pentode instead of a 6V6. Solid-state rectification, a master volume and a boost switch make it a roughly one-to-two-watt practice and recording amp that gets the simple Champ's breakup at low volume, with a headphone jack on the output.

• Made in: USA
• Wattage: 1W
• Channels: 1
• Preamp tubes: 1× 12AY7
• Power tubes: 1× EF80

Tags: diy, american, tweed, low-wattage, breakup, class-a, practice.

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.