The VTU-5790C from Communications & Power Industries is a Traveling Wave Tube with Frequency 16.1 to 16.7 GHz, Peak Output Power 8 kW, Gain 46 dB, Collector Voltage 20 to 22 V, Cathode Voltage -31 to -29 kV. Tags: Coupled Cavity. More details for VTU-5790C can be seen below.