In almost every case—except for the Copland, which broke far too often to justify keeping, and the Emotive Audio Sira, which ...

We report on progress in developing a travelling wave tube amplifier with significant gain and power at 220 GHz. This paper provides an overview of the program, describing fabrication and test of slow ...

The Dynaco ST-70 is one of the most popular tube amplifiers ever. First released in 1959, it's still sought after by hi-fi enthusiasts today.

A traveling wave tube amplifier operating above 300 GHz based on folded waveguide (FWG) slow-wave structure is presented in this paper. The design and test results of key components are presented, ...