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ID = 4310
Tube type:  Triode, vacuum   VHF 
Identical to 3BN4A
Similar Tubes
Other characteristic (electr. data):
Heater different:
  2BN4A ; 6BN4A

Base Miniatur-7-Pin-Base B7G, USA 1940
Was used by Radio/TV-reception etc.
Filament Vf 3 Volts / If 0.45 Ampere / Indirect / Specified current AC/DC ~ = (Series working)
Information source Essential Characteristics, GE 1973   
3BN4A: Photo of tube from my collection - TS
Tomasz Szczesniak

3BN4A: RCA Tube Manual
Peter Hoddow

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3BN4A: RCA Tube Manual
Peter Hoddow

from Just Qvigstad

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