Vacuum Tubes Present History
Markets for Vacuum Tubes
The microwave and millimeter wave high-power vacuum electron devices marketplace is just one of the many markets for vacuum tubes. Currently, just this market niche alone is running at $1 Billion annually, according to a report from ABI Research, December 2012.
In 2014, revenues for US manufacturers of specialized tubes (cathode ray tubes, klystrons, magnetrons, & traveling wave tubes) were $1.4 billion with gross profits of 30.84%, according to Research & Markets in their October 2015 report.