Since the 12AU7 is of the Twin Triode variety, one tube can be used to amplify both a left and right audio channel. The case for the amplifier is laser cut plywood. The top piece is kerfed so ...

With the wealth of cheap and highly integrated audio amplifier modules on the market ... tubes before — we even recently featured a DIY X-ray tube — but there’s something about [jdflyback ...

First made in 1959, this is the best-selling tube amplifier ... new company’s amplifiers. Uniquely, Dynaco sold its ...