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ID = 27488
Great Britain (UK)
Brand: Osram-Valves GB (not MO-Valves)
Developer: Marconi's Wireless Telegraph Co. Ltd. 
Tube type:  Transmitting Triode, air cooled 
  <1925 rare.
Identical to MT12 = CV3564

Base Wires Wires only.
Was used by Transmittertube (Radio)
Filament Vf 12.5 Volts / If 5.5 Ampere / Direct / Specified voltage AC/DC

Pa <200W. Short wave transmitting tube operating at 2kV.

Dimensions (WHD)
incl. pins / tip
125 x 330 x mm / 4.92 x 12.99 x inch
Information source - - Data from my own collection   
- - Manufacturers Literature   1936 Marconi Transmitting Valve catalog

Collection of



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