The VTC-5767A from Communications & Power Industries is a Traveling Wave Tube with Frequency 5.4 to 5.9 GHz, Peak Output Power 20 kW, Gain 43 dB, Collector Voltage 18 to 21 kV, Cathode Voltage -26 to -24 kV. Tags: Coupled Cavity. More details for VTC-5767A can be seen below.