What tubes does the Selmer Thunderbird Twin 30 use?

The Selmer Thunderbird Twin 30 uses 3× ECC83 preamp tubes and 4× EL34 power tubes.

When was the Selmer Thunderbird Twin 30 produced?

The Selmer Thunderbird Twin 30 was produced 1965–1970.

Selmer Thunderbird Twin 30 preset

Verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Selmer Zodiac Twin 30/50 was a switchable-power amplifier allowing the user to select between 30 and 50 watts, a forward-thinking feature for its era. Its dual-channel layout and EL34-based output section produced the clean, warm British tone that Selmer's Zodiac series became known for. The wattage-switching capability gave it flexibility across a range of performance contexts.

Years produced: 1965–1970
Made in: UK
Channels: 2
Preamp tubes: 3× ECC83
Power tubes: 4× EL34

Tags: british, 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.