Fair enough, that part sounds boring, but we hope to endure it at some point in the future because vacuum tube fabrication demos feel very much like a Hackaday event!

circuits [David] has already built vacuum tube versions of. The only part left was the discharge transistor; a pentode was enlisted to stand in for that vital function, making the circuit complete.

The history of vacuum tubes in synthesizers goes all the way back to 1939: the Hammond Novachord, one of the first polyphonic synths ever commercially manufactured, relied on an array of 163 vacuum ...

Generally, when using a vacuum cleaner, we don’t think about the significance of its individual parts, leaving many ... of the hole in the vacuum cleaner tube: Helps save a lot It’s a simple ...