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ID = 11978
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Photocell High vakuum   Detector 
Identical to 919 = NU31V
First Source (s)
20.Mar.1943 : -- Original-techn. papers.

Base UX-Base (4 Pins (2 thick, USA 1924, UX) Top contact with a cap.
Was used by Technology / Measurement

Low-leakage, side-on type having S-1 response. Has the photocathode connected to the top cap.

Dimensions (WHD)
incl. pins / tip
30 x 110 x mm / 1.18 x 4.33 x inch
Tube prices 2 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   RCA Phototubes and Photocells PT-60
  919: RCA Phototubes 1941
David Erali
919: RCA 919 USA
John Albion

919: elektron taschenbuch 1952
Heinz Höger

919: RCA
Patrice Zeissloff

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