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868

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ID = 18370
       
Country:
Worldwide
Brand:
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Photocell Gas filled   Indication 
Identical to 868 = WL-735 = NU1 = 38268 = 1P23
Similar Tubes
Normally replaceable-slightly different:
  GL-441 ; GL-868 ; PJ-23 ; SE-3982 ; UX868
Predecessor Tubes 867   UX868  

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Technology / Measurement
Filament
Description

Side-on type having S-1 response. Wavelength of maximum spectral response is 8000 +/- 1000 angstroms. This type makes use of a semicylindrical photocathode, and has a direct interelectrode capacitance of 3 picofarads. Anode-Supply voltage is 90 volts. A special black painted tubular brass "hood" with a circular hole in the side, approx. 25 mm diameter , was available for this tube

 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
29 x 98 x 29 mm / 1.14 x 3.86 x 1.14 inch
Weight 31 g / 1.09 oz
Tube prices 2 Tube prices (visible for members only)
Information source Tube Lore (II)   p. 80 & 213
- - Manufacturers Literature   RCA Phototubes and Photocells PT-60
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49

rca_phototube_fig1.png
868: RCA Phototubes 1941
David Erali

868sockel_1.gif 868: KoBi
Konrad Birkner † 12.08.2014


Just Qvigstad
868_data_p1.png
868: AWV Radiotron Valve Data Book
Stuart Irwin

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Collection of

 
868rcaradiotron_2_klein.jpg

868
 

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