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ID = 57819
Great Britain (UK)
Tube type:  Transmitting Triode, air cooled   Text 
  <1925 very rare. ***
Identical to AT100
Similar Tubes
Other base:

Base SPECIAL TUBEBASE in general Top contact with a cap.
Was used by Military and/or Government
Filament Vf 10 Volts / If 3.5 Ampere / Direct / Specified voltage AND current AC/DC

100 watt transmitting tube first made for the British Army in 1920. Tube has three "feet" connetions on base. Anode from top screw terminal.
This tube also made by the Edison-Swan Electric Co (Ediswan)

Dimensions (WHD)
incl. pins / tip
110 x 230 x mm / 4.33 x 9.06 x inch
Information source British Radio Valves - The Vintage Years: 1904-1925   Pages 77, 78, 86 & 92

at100.png AT100: Fin Stewart
Fin Stewart



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