Rikstone H30S preset

Close · 60/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Rikstone H30S is a small-builder valve amp, and the only sheet on file is its power supply. A 230 V mains transformer feeds two 1N5408 diodes in a full-wave silicon rectifier, a 10H choke with 100 uF filtering and a standby switch, plus a separate low-voltage bridge running a cooling fan. The 6.3 V heater string serves eight valves, four wired like dual triodes and four like EL84s. The amp circuit itself is not shown.

• Made in: Finland
• Wattage: 30W
• Channels: 1
• Power tubes: 4× EL84

Tags: 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.