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ID = 31352
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Thyratron   Power-supply 
Identical to XR1-6400 = 5545 = CV2215
Similar Tubes
Other shape (e.g. bulb type):

Base Super Jumbo (4 pin) with Bajonett B4D Top contact with a cap.
Was used by Industrial
Filament Vf 2.5 Volts / If 20 Ampere / Direct

Inert Gas Triode Thyratron
Va <1.5kV, 80A peak. Ia < 6.4A mean

Dimensions (WHD)
incl. pins / tip
67 x 229 x mm / 2.64 x 9.02 x inch
Weight 260 g / 9.17 oz
Information source - - Manufacturers Literature   
XR1-6400: Photo of tube from my collection - TS
Tomasz Szczesniak

XR1-6400: Manufacturer's Literature
Emilio Ciardiello

XR1-6400: Mullard-original papers
Bernd Staginnus

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