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ID = 29692
Great Britain (UK)
Brand: English Electric Valve Company Ltd. (EEV); Chelmsford
Tube type:  Thyratron 
Identical to CV8563 = CX1140
Similar Tubes
Normally replaceable-slightly different:

Base Other combinations of connections.
Was used by Radar
Filament Vf 6.3 Volts / If 22 Ampere / Half indirect

Tetrode Hydrogen Thyratron Va<25kV Ia<30A pk, 1.25A mean. Wire ended plus top cap.
Also available in B and C versions with ceramic and modified glass envelopes.

Dimensions (WHD)
incl. pins / tip
125 x 400 x mm / 4.92 x 15.75 x inch
Weight 2100 g / 74.08 oz
Information source -- Original-techn. papers.   
- - Manufacturers Literature   

5ch_thy~~1.png CV8563: Manufacturer's Literature
Emilio Ciardiello

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