All General Amp Repairs (Speaker / Crackling / Inputs) in Mikado

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NOS Valves

NOS Valves is a tube amplifier repair and design shop run by Craig Ostby out of Mikado, Michigan. Operating since at least 2003, the shop has built a reputation around high-quality tube amp work, offering repair, modifications, and custom amplifier design. Craig’s focus is squarely on the world of vacuum tube electronics, making NOS Valves

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