Current Vacuum Tube History: First Terahertz Vacuum Amplifier Created

Current Vacuum Tube History First Terahertz Vacuum Tube Amplifier Created Vacuum tubes bring back visions of antique electronics, but these are not your grandparents’ TV sets or radios. DARPA-sponsored research has taken tools developed by the semiconductor and MEMS revolution & microfabrication methods and materials;and applied them to reliable, efficient vacuum tube technologies, making the…

Museum Lab Column: Photographing Glass: Controlling Contrast

Museum Lab Column: Photographing Glass: Controlling Contrast Vacuum tubes have many different materials, glass, metal, ceramics, and so many reflective surfaces, combining to make vacuum tube photography quite difficult, especially for archival work. In this tutorial, Andrew Fortune shows his excellent light table and lighting design for the difficult photography of glass objects, and we…