The VTM-6199C4 from Communications & Power Industries is a Traveling Wave Tube with Frequency 5.85 to 14.5 GHz, Power 95 to 140 W, Collector Voltage 55% Ew to 65% Ew kV (DC), Cathode Current 185 to 220 mA(DC). Tags: Helix. More details for VTM-6199C4 can be seen below.