The VTU-6397H9C from Communications & Power Industries is a Traveling Wave Tube with Frequency 14.9 to 15.4 GHz, Power 550 W, Peak Output Power 1.2 kW, Gain 45 dB, Collector Voltage 51 to 53 kV (DC). Tags: Helix. More details for VTU-6397H9C can be seen below.