E2V Technologies / Marconi model FX2648A hydrogen thyratron. Rated 25kV peak anode voltage, 1000A peak anode current, 1A average anode current. New/Surplus. In original box. At the time of listing, we have 3 tubes, branded E2V, EEV, and Marconi (same manufacturer, name changed over time). See detailed photos showing each unit. To view a full specification sheet (PDF), click here.