What tubes does the Magnatone 280-B - Channel 1 use?

The Magnatone 280-B - Channel 1 uses 3× 12AX7, 3× 6CG7, 1× 12BH7 preamp tubes and 4× 6CZ5 power tubes.

Who famously used the Magnatone 280-B - Channel 1?

Neil Young are among the notable players associated with the Magnatone 280-B - Channel 1.

Magnatone 280-B - Channel 1 preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 280-B revision of Magnatone's late-1950s flagship stereo-vibrato amp, the 280. Two channels, each with A and B inputs and their own treble, bass and volume, feed the varistor pitch-shifting vibrato, with a 12AX7 oscillator (Speed, Intensity, footswitch) and a 12BH7 Stereo/Normal stage. Inverters from 6CG7 and 12AX7 halves run two push-pull pairs of 6CZ5s (or 6973s) into two output transformers, on a 5U4GB.

Made in: USA
Channels: 2
Preamp tubes: 3× 12AX7, 3× 6CG7, 1× 12BH7
Power tubes: 4× 6CZ5

Known for: Neil Young.

Tags: american, vintage, vibrato, stereo, 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.