This video from Thermcraft shows the production of gold plated tubes for their TransTemp transparent tube furnaces. These furnaces use an outer tube with its internal face gold plated to reflect heat ...

The audio device marries old and new with vacuum tube audio working alongside transparent OLED panel technology ... even create a "fireplace" with the tubes visible along the flames.

Designed by LG Labs, the DukeBox pairs old-timey vacuum tubes as seen on a jukebox with a modern OLED panel for a mixed bag of audio visual wonders. Although marketed as a mere smart speaker ...