... characteristicsFilament thoriated tungstenFilament voltage (+ 5 %, - 10 %)7.2 VFilament current 180 ASurge current 500 A max.Cold resistance 5 mΩCapacitances:grid ... MHz 7 kVControl grid voltage - 1 500 VAnode current, CW 8 AControl-grid current:at full load, CW 1.6 Aat no load ... , CW 3 APeak cathode current, CW 40 A ITL15-2 ...