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ID = 7157
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
  Ca. 1925 up to 1945 rare.
Identical to U5 = CV3743
Similar Tubes
Other base:
  E805 ; U5_UX
First Source (s)
1926 : 70 Years of Radiotubes and V. p. 119
1926 : History of the British Radio Valve to 1940 p. 168

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Er)
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 1.6 Ampere / Direct / Specified voltage AC/DC

Va <400, Ia <45mA mean

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
56 x 130 x mm / 2.20 x 5.12 x inch
Information source - - Manufacturers Literature   Pamphlet 243
-- Original-techn. papers.   

u5.gif U5: AH eigene Sammlung
Alexander Hofer

Just Qvigstad
U5: own collection
Peter den Boer

More ...
Usage in Models 1= 1927? ; 1= 1929 ; 4= 1930

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):6

Collection of



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