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ID = 33876
Tube type:  Photomultiplier 
Identical to 9558Q

Filament --/--
Description 2-inch diameter, quartz top window photomultiplier. S-20 type semi-transparent photocatode, with sensitivity extending from red to UV; 11 venetian-blind dynodes coated with CsSb. Extended temperature range. Intended for flame spectrophotometry and for applications in astronomy. 19 pin, B19A, glass base.
EMI/US, North Hollywood, CA, USA, known manufacturer. 
Information source - - Manufacturers Literature   
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9558Q: Manufacturer's Literature
Emilio Ciardiello

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