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XE4

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ID = 33509
       
Country:
Great Britain (UK)
Brand: Hivac Ltd.; Harrow-on-the-Hill
Developer: Hivac Ltd.; Harrow-on-the-Hill 
Tube type:  Electrometer Tetrode or Pentode 
Identical to XE4

Base Subminiatur (wire-ends, flat) B5A
Filament Vf 1.25 Volts / If 0.015 Ampere / Direct / Specified voltage AC/DC
Description Va <7.5V. Ik <0.1mA Ig <10^-13A; gm = 0.07mA/V 
Information source Universal Vade-Mecum, Electron Valves and Semiconductor Devices   


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