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ID = 8266
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Tube type:  High-vacuum Rectifier   Power-supply 
Identical to U30 = ZA7237 = CV3752
First year 1924 Tube leaflet collection E.Erb Analysis by original leaflets

Base British-7-Pin, old (M7A) (Codex=Ni)
Filament Vf 26 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC
Description Center tapped filament enables parallel feed 13 V / 0.6 A or series supply at 26 V / 0.3 A. Independent systems (separate cathodes). Also for voltage doubler circuit. 
Text in other languages (may differ)
Information source Taschenbuch zum Röhren-Codex 1948/49   Funke W18, Karte 437
Babani, International Radio Tube Encyclopaedia   
U30: Photo of tube from my collection - TS
Tomasz Szczesniak

More ...
U30: Telefunken Werkstattbuch
Wolfgang Bauer


from Just Qvigstad

Usage in Models 5= 1934 ; 1= 1935?? ; 1= 1935? ; 11= 1935 ; 1= 1936?? ; 1= 1936? ; 11= 1936 ; 4= 1937 ; 1= 1955

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):36

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