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ID = 4205
Tube type:  Half-Wave Vacuum Rectifier 
Identical to 2BU2 = 2AH2

Base Duodecar 12-pin, B12C Glass (USA 1961)
Filament Vf 2.5 Volts / If 0.33 Ampere / Indirect
Tube prices 1 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   

2bu2_sock.png 2BU2: Essential Characteristics
Anonymous 15 Collector

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Just Qvigstad
2BU2: RCA Tube Manual
Peter Hoddow

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