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ID = 25230
United States of America (USA)
Brand: RCA (RCA Victor Co. Inc.); New York (NY)
Tube type:  Photocell Gas filled 
Identical to 1P40
Similar Tubes
Normally replaceable-slightly different:
  930 ; GL-1P40 ; GL930
First Source (s)
15.Aug.1947 : -- Original-techn. papers.

Base Octal (Int.Octal, IO) K8A, USA 1935
Was used by Technology / Measurement

Red-infrared-sensitive  (up to 8000 Angstroms). Special design with a non-hygroscopic base for increased resistance between anode and photocathode pins under adverse conditions of high humidity. Side-on type having S-1 response. Has a maximum anode dark current at 25°C of 0.005 microampere at 90 volts.

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Dimensions (WHD)
incl. pins / tip
30 x 78 x mm / 1.18 x 3.07 x inch
Tube prices 1 Tube prices (visible for members only)
Information source - - Manufacturers Literature   RCA Phototubes and Photocells PT-60

930_pin_1.png 1P40
Emilio Ciardiello

Just Qvigstad
1P40: RCA
Patrice Zeissloff

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