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ID = 28400
Great Britain (UK)
Tube type:  Transmitting Triode, air cooled   Power/Output 
  <1925 very rare. ***
Identical to AT25 = T25
First year 1922 Saga of the Vacuum Tube, Tyne Seite 381

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Transmittertube (Radio)
Filament Vf 5.5 Volts / Direct / Battery =

Made for the British Army. Also made by Mullard and Ediswan. Ediswan tube used their chahacteristic 4 "pillar" element mounting.

Dimensions (WHD)
incl. pins / tip
108 x 55 x mm / 4.25 x 2.17 x inch
Information source British Radio Valves - The Vintage Years, Thrower   p.77
AT25: Fin Stewart collection
Fin Stewart

AT25: Fin Stewart
Fin Stewart


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