An H6 Systems Modulator is under construction. This is part of a portable magnetron transmitter we are building for a University that is involved in both medical and defense research.
The current effort is to provide the shortest high-power pulses possible from a standard tube.
By contract, we are not allowed to give too many details, but the photos give an idea of what we are doing. It shows a voltage pulse across one tube and the current drawn as it produces a megawatt in just 90nS at 3-5GHz. We are working on even higher power and shorter pulses.
H6 Systems has built a 100kW amplifier to operate from 1250 - 1350 MHz. We have used triode-based cavities to keep the system compact and low-cost