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ID = 27772
Tube type:  Thyratron 
Identical to 5557 = PL17 = FG17 = ST17 = PL5557 = CV2957 = 718_Thyratron

Base OTHER TUBEBASE in general Top contact with a cap
Filament Vf 2.5 Volts / If 5 Ampere / Direct /
Description Also made in Italy by Fivre. 
Text in other languages (may differ)
Tube prices 1 Tube prices (visible for members only)

Emilio Ciardiello

5557: Essential characteristics
Peter Hoddow

5557: Manufacturer's Literature
Emilio Ciardiello

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