• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Build to order

There are a few professional custom tube amplifier builders, at least in Italy. Most of them do not advertise online, but there are exceptions such as SB-LAB - La passione per le Valvole ; this is one of the least expensive (it currently asks 30 euro/hour). I don't have any affiliation and I don't know the quality of his work. Some of them could also supply the CNC machined chassis parts and/or the wood. They target the luxury market, so your Tamura transformers, albeit expensive, would be a just a drop in the ocean of money needed.