RCA 1P40 Photocell Tube  
Written by AnubisTTP on 2006-11-25  


The RCA 1P40 is a fairly standard example of a cold cathode photocell tube. The tube contains a centrally located anode and a curved photosensitive cathode, most likely coated with cesium. The 1P40 has an argon fill gas and an octal base, though only five of the pins on the base have been populated. The 1P40 is sensitive to red and infrared light - an S1 spectral response.


RCA 1P40 Photocell Tube
RCA 1P40 phototube.

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