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Information - Help 
ID = 4230
Tube type:  Triode, vacuum   UHF 
Identical to 2DY4A
Similar Tubes
Normally replaceable-slightly different:
Heater different:

Base Miniatur-7-Pin-Base B7G, USA 1940
Filament Vf 2.05 Volts / If 0.45 Ampere / Indirect / Series, ~ = (AC/DC defined current)
Information source Essential Characteristics, GE 1973   
2DY4A: Essential characteristics
Peter Hoddow


from Just Qvigstad

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