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ID = 35596
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Tube type:  Ionisation or Vacuum Gauge 
Identical to D-79510
Similar Tubes
Different maximum ratings:
Predecessor Tubes 205B  

Was used by Technology / Measurement
Filament Vf 4.5 Volts / If 1.6 Ampere / Direct

Spherical ionization gauge. 205B with 3" soft glass tube on top as inlet measurement port. UV-style ceramic base: 1 and 4 heater, 2 plate, 3 grid.
Sibley gives wire lead terminations for this model. The UV base of the sample in the photos was added later, to the customer specs.

As ionization gauge the anode is biased negative, -2 to -10 volts, while the grid must be positive, 100 to 125 volts typical, 5 to 25 mA. In operation filament voltage must be reduced for a grid current of 21 mA at 110 V DC. In this condition the pressure in mm. of mercury is about five times the plate current in amperes, P = 5 Ip.

Similar to the D-79512, but for the bulb shape and the glass type, nonex for that one.

Data and applications available in the attached PDF.

Information source Tube Lore (I)   

Collection of

Documents about this component
  Western Electric booklet covering D79510 and D79512 ionization vacuum sensors. 163 KB


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