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ID = 29165
Brand: Common type Worldwide tube/semicond.
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Photomultiplier 
Identical to 931A = 27M1 = CV337 = GL931A
Similar Tubes
Normally replaceable-slightly different:
  931VA ; CV2696

Was used by Technology / Measurement

9 stage Photo-multiplier.
Va<950, Ia<1mA. Current Gain 1,000,000 with 100V per stage.
Peak spectral response 4500 Å.
Base 11pin Sub Magnal

Dimensions (WHD)
incl. pins / tip
33 x 94 x mm / 1.30 x 3.70 x inch
Tube prices 3 Tube prices (visible for members only)
  931A: de oude delft, optische Industrie, PHT-7, Nr.3TC1635,9
Jörg Sigg
931A: Eigene Sammlung
Aldo Patriarca

931A: Original data sheet
Michael Schlör

931A: Firmeninfo
Anonymous 15 Collector

Usage in Models 1= 1957 ; 1= 1960 ; 1= 1963?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):3

Documents about this component
  931A photomultiplier: A very early application of 931A in an optical scanner with character recognition capabilities. From Electronics, May 1955. 1403 KB

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