The VTC-5764A from Communications & Power Industries is a Traveling Wave Tube with Frequency 5.4 to 5.7 GHz, Peak Output Power 30 kW, Gain 47 dB, Collector Voltage 16 to 20 kV, Cathode Voltage -25 to -28 kV. Tags: Coupled Cavity. More details for VTC-5764A can be seen below.