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ID = 83020
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Tube type:  Ionisation or Vacuum Gauge   Indication 
Identical to 29D12

Base Wires
Was used by Industrial
Filament Direct

Penning type tube with soft glass and extra filament,

Max. anode voltage 2500, Max. anode current. 2mA.

Dimensions (WHD)
incl. pins / tip
x x 29 mm / x x 1.14 inch
Information source - - Manufacturers Literature   Ediswan tube catalog January 1959
29D12: Ediswan tube catalog January 1959
Fin Stewart


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