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ID = 28813
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Tube type:  Transmitting Triode, air cooled   Power/Output 
  <1925 very rare. ***
Identical to T30_MO
First year 1922 Saga of the Vacuumtube, Tyne page 381
First Source (s)
1918 : British Radio Valves - The Vintage Years, Thrower p.69

Base Europe 4-Pin (A, 4A, B4, since 1914)
Was used by Transmittertube (Radio)
Filament Vf 7 Volts / If 1.8 Ampere / Direct / Parallel / series AC/DC

1000V anode voltage; mu 35. 30 watts. First tbe made was tubular measuring 135 mm length and 60 mm width. Design changed to "R" style in 1923/24

Dimensions (WHD)
incl. pins / tip
60 x 135 x mm / 2.36 x 5.31 x inch
Literature - - Manufacturers Literature   Marconi catalog No. 520, Sept. 1928
- - Manufacturers Literature   M.O.Valve catalog 1923
T30_MO: Manufacturer's Literature
Emilio Ciardiello

T30_MO: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

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