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ID = 27415
United States of America (USA)
Brand: RCA (RCA Victor Co. Inc.); New York (NY)
Tube type:  Photomultiplier 
Identical to 7326

Base Diheptal (14 pin glass U14)

Ten-stage, head-on, flat-faceplate type having S-20 response. Wavelength of maximum spectral response is 4200 +/- 500 angstroms. Makes use of silver-magnesium dynodes and a curved-circular, potassium-bismuth-sodium-cesium, semi-transparent photocathode. (May also be ordered with copper-beryllium dynodes). Window material is Corning No. 0080 lime glass or equivalent. Has a non-hygroscopic base. 

Dimensions (WHD)
incl. pins / tip
50 x 170 x mm / 1.97 x 6.69 x inch
Weight 170 g / 6.00 oz
Information source - - Manufacturers Literature   RCA Phototubes and Photocells PT-60

Just Qvigstad
7326: org.Doku
Franz Born †

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