Pavel Kostas, owner of Audio Amp in the Czech Republic and the Miller Audio team have always been big fans of the Dynaco ST-35 tube amplifier, and we both love the sound of EL-84 / 6BQ5 tubes. In 2024, working with Dave Gillespie of Dave Gillespie Designs and Chris Keller of Retropro Audio, we collaborated to revive production of the Dynaco ST-35 amplifier. Our plans included making a new chassis with a bit more interior volume and we planned all along to have a fully automatic bias system. We have in stock and ready to ship. Note: The ST-35 Auto Bias Module will not fit in an original Dynaco ST-35 Chassis!