Re:High-Tech can’t last: there are limited essential elements
by pjc50 on Wednesday June 12, 2019 @08:18AM
(#20163759)
The nanoscale vacuum transistor is still a silicon device - part of the point of it is that it can be produced in a conventional fab!
Power diodes are not going to be a problem, they are a comparatively crude device from the 50s.
https://www.sciencealert.com/vintage-vacuum-tube-tech-could-...
Also regular vacuum tubes are still pretty competent for power applications.
Making a switching power supply might be a challenge though - we would have to return to using Thyratrons which contain mercury vapour.