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CV5957 / XR1-12A thyratron

Size
 This valve measures 285x130mm overall (180x83 glass body)

Filament voltage2.5V
Filament current40A
Max anode voltage1.5kV
Max mean anode current12.5A
Max peak anode current160A

The lugs at the bottom are the filament connections, the grid is connected by the heatsink and the anode is the top lug.

 CV5957 / XR1-12A