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ID = 31777
Tube type:  Photocell Gas filled 
Identical to 1P23
Similar Tubes
Normally replaceable-slightly different:
First Source (s)
07.Jul.1943 : -- Original-techn. papers. RCA RMA 341

Filament No heater

Photocell for sound-track reproduction. Painted glass bulb.
190 uA/lumen, S-1 spectral response.

Tube prices 1 Tube prices (visible for members only)
Information source Tube Lore (I)   
1P23: KG
Kevin Gregson

1P23: Manufacturer's Literature
Emilio Ciardiello


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