The VTM-6292M4 from Communications & Power Industries is a Traveling Wave Tube with Frequency 8 to 18 GHz, Power 250 W, Gain 33 dB, Collector Voltage 5 to 5.67 kV (DC), Cathode Current 300 mA(DC). Tags: Helix. More details for VTM-6292M4 can be seen below.