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ID = 11983
United States of America (USA)
Brand: RCA (RCA Victor Co. Inc.); New York (NY)
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Photocell Gas filled   Text 
Identical to 924
Successor Tubes 1P41  

Base Edison, size not known (Codex=Edison 10 mm)
Was used by Technology / Measurement
Filament No heater

This phototube has an American Intermediate screw Edison base which is 16 mm diameter. It was used to a considerable extent in animated signs  by the Douglas Lee Corporation. It was considered inferior bacause of current leakage betwen the screw shell and the centre base contact and replace by the 1P41. 

Dimensions (WHD)
incl. pins / tip
21 x 56 x mm / 0.83 x 2.20 x inch
Weight 10 g / 0.35 oz
Tube prices 1 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
Tube Lore (II)
  924: RCA Phototubes 1941
David Erali
924: 924 RCA USA
John Albion

924: elektron taschenbuch 1952
Heinz Höger

924: RCA
Patrice Zeissloff

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