The LD7262 series from NEC Network and Sensor Systems is a Traveling Wave Tube with Frequency 5.85 to 6.75 GHz, Power 750 W, Gain 47 dB, Collector Voltage 2.9 to 6.2 kV, Cathode Voltage 11.3 kV. Tags: Helix. More details for LD7262 series can be seen below.