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ID = 77837
Great Britain (UK)
Brand: EMI; Hayes, Middlesex
Tube type:  Photomultiplier 
Identical to 9524A
Successor Tubes 9524B  

Was used by Technology / Measurement

1.15-inch diameter, top window photomultiplier. Lime soda glass window, S-11 type photocatode; 11 dynodes coated with CsSb. 14 pin, B14B base. Intended for scintillation counter applications.
EMI/US, North Hollywood, CA, USA, known manufacturer.

Information source - - Manufacturers Literature   
9524A: Private collection
Emilio Ciardiello

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