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ID = 25301
Brand: Cerberus AG, Schweiz
Tube type:  Voltage Regulator, single 
Identical to SR3B

Base Noval, 9 pin miniature (USA pico-9) B9A
Filament --/--
Dimensions (WHD)
incl. pins / tip
21 x 48 x mm / 0.83 x 1.89 x inch
Information source -- Original-techn. papers.   
Schweizer Elektronenröhren 1917-2003, Willi E.   S. 99

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