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ID = 37039
Great Britain (UK)
Brand: Ferranti, GB
Tube type:  Thyratron Cold-cathode 
Identical to GK33
Similar Tubes
Other base:

Base Wires
Filament No heater / No heater

Pulse operation - Triode Ia <20mA peak; Trigger voltage 85-98.

Information source - - Manufacturers Literature   

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