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ID = 17713
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Developer: MO Valve Co. Ltd.; GB 
Tube type:  Triode, vacuum   Audio Frequency 
  <1925 rare.
Identical to DE5B
Similar Tubes
Normally replaceable-slightly different:
Other class quality (otherwise equal):
Other characteristic (electr. data):
Heater different:
First Source (s)
Sep.1924 : British Radio Valves - The Vintage Years: 1904-1925 p.52

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 5.5 Volts / If 0.25 Ampere / Direct / Battery =

Filament Volt range 5 to 6 volts. Va <60-150 Z=30k. A higher voltage/gain/impedance version of the DE5 and specifically intended for RCC coupled amplifiers.
Typical values:- Va 60 to 120; Amplification Factor 20 (Manufacturer's data).

Dimensions (WHD)
incl. pins / tip
55 x 125 x mm / 2.17 x 4.92 x inch
Tube prices 1 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   Dowsett
Babani, International Radio Tube Encyclopaedia
Saga of the Vacuum Tube, Tyne

b4_base_pins~~43.png DE5B: Fin Stewart
Fin Stewart

Just Qvigstad
DE5B: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

More ...
Usage in Models 1= 1922?? ; 1= 1922 ; 1= 1924?? ; 1= 1925

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):4

Collection of



Forum contributions about this tube
Threads: 1 | Posts: 1
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Gerhard Eisenbarth

Testbericht zur Röhrentype DE5B von Marconi-Osram

Quelle: The Wireless World and Radio Review, 24. Sept. 1924


End of forum contributions about this tube

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