The Nu-Valve tube overdrive is a very small number edition guitar pedal produced by Alfonso Hermida that's hand made and signed in 2010 and I believe is a number 04 from the early production of this model and they are extremely RARE and almost impossible to find.

Overview:

The Hermida Audio Nu Valve uses two miniature vacuum tubes called

Nuvistors, introduced by RCA in the

'50s in an attempt to compete with the new solid state circuits, to create its overdrive tones. Volume, Gain, Tone and Voice knobs allow you to tailor the effect from a bitey British top boost to a raging Hiwatt stack distortion.

Exceptionally well preserved.

Collectors condition. The Hermida Audio Nu Valve uses two miniature vacuum tubes called Nuvistors,

introduced by RCA in the '50s in an attempt to compete with the new solid state circuits, to create its overdrive tones. Volume, Gain, Tone and Voice knobs allow you to tailor the effect from a bitey British top boost to a raging Hiwatt stack distortion.

Quote from Art Thompson;

"The Nu-Valve excels at tube-style overdrive with a British accent, and it has plenty of gain range to cover anything from blues to rock to classic metal. The dynamic response is excellent, and the Voice control doesn't radically alter the sound, but rather functions like an amp's presence control to allow you to fine-tune the top-end for exactly the distortion textures you want from humbucker or single-coil pickups. The Nu-Valve can also deliver a lot of output regardless of where the Gain knob is set, which makes it abundantly useful as a tube-powered booster for overdriving vour amp's front end.